Paul Casey hits a hole-in-one to seal a 5&4 foursomes win with David Howell over Stewart Cink and Zach Johnson and help Europe stretch their lead.
Casey's hole-in-one was the first in the Ryder Cup since 1995
Tiger Woods and Jim Furyk completed a 3&2 win over Padraig Harrington and Paul McGinley in the last match.
Europe's Colin Montgomerie and Lee Westwood finished all square with Chad Campbell and Vaughn Taylor.
And the in-form Sergio Garcia and Luke Donald secured a deserved 2&1 victory over Phil Mickelson and David Toms.
DAY TWO AS IT HAPPENED (all times BST):
By Alex Trickett & Phil Harlow
"Ian Woosnam would have taken 10-6 at the start of play."
BBC golf commentator Andrew Cotter
US WIN: At last, there is a win for the United States team as a well-weighted putt from Jim Furyk brings about the concession from Europe. A slightly downbeat conclusion to the day for Europe, but the Ryder Cup holders have certainly taken the honours on day two at the K Club.
1830: Europe pair Paul McGinley and Padraig Harrington are doing their utmost, but the match is surely destined to put an American point on the board. The US have two putts to bring the day's play to a close and surely they will not mess things up from here.
1815: Talking of something special, US star Jim Furyk supplies it with the next shot of the match as he makes a stunning putt from at least 20 feet.
Paul McGinley almost follows suit with his putt, but it lips out and gives the US a 3 up lead with three to play.
1811: Padraig Harrington sends his approach to within seven or eight feet at the 15th. Europe need something special if they are to turn this match to their advantage and the Irishman may have made a contribution with that shot.
MATCH HALVED: Two valiant efforts at long putts - the first from Chad Campbell, the second from Lee Westwood - both roll up just short and brings a hard-fought match to an honourable conclusion.
1755: Tiger Woods nails a six-foot putt to put him and Jim Furyk back to 2 up.
1740: The US pair of Chad Campbell and Vaughn Taylor have not given up hope of getting a much-needed point from their match with Colin Montgomerie and Lee Westwood.
They birdie the 17th to bring the match back to all square and set up a final hole shoot-out.
1739: Padraig Harrington plays a glorious shot to the green to give partner Paul McGinley the simplest of tasks with the putt. The Irishman makes no mistake and the match is back to within a single shot again. The US still lead 1 up.
EUROPE WIN: And what a way to seal it! Paul Casey makes a hole-in-one at the 220-yard par-three 14th to secure a 5&4 win, the most one-sided match of this year's Ryder Cup.
It's the first in the Ryder Cup since 1995, and Casey is understandably mobbed by David Howell, the caddies and anyone else in the vicinity.
1733: Casey and Howell are guaranteed at least a half, but - barring an astonishing US comeback - have effectively sealed another point as they come through the 13th unscathed to stay 5 up with five to play.
EUROPE WIN: Phil Mickelson's horribly overhit approach at the 17th finds a bunker and forced David Toms to try to hole his shot. Toms goes close but the ball stays out and gives Europe two putts to win their first point of the afternoon.
Luke Donald rolls the first to within two feet and the US pair concede. Sergio Garcia's enjoyable trip to the K Club is showing no signs of coming to an end.
1726: David Howell and Paul Casey are almost home and dry as they progress to 5 up with a birdie at the 12th. Europe are dominating proceedings yet again at the K Club.
1722: Vaughn Taylor misses a seven-foot putt at the 16th and the Americans' chances of getting anything out of the match are receding by the minute.
1714: Another chance to cut Europe's healthy lead goes begging as Zach Johnson's putt lips out at the 11th.
1711: Luke Donald gets the gallery and his team-mate Sergio Garcia going with an absolutely brilliant putt. It means David Toms has to hole his putt from the edge of the green to save the hole.
Toms misses narrowly, and Europe secure a vital 2 up lead with two holes to play. US captain Tom Lehman shakes his head and closes his eyes. This session is not going to plan.
1704: Vaughn Taylor is unable to convert a long putt after a miserable 15th hole, meaning Colin Montgomerie and Lee Westwood regain the advantage with a 1 up lead.
1702: Paul McGinley gets the ball back onto the green as best he can but Padraig Harrington misses the subsequent 15 foot putt and Tiger Woods and Jim Furyk go back to a 2 up lead.
1656: Vaughn Taylor puts his tee shot at the 15th into the water. Not what US captain Tom Lehman wanted to see.
1652: David Toms and Phil Mickelson make a complete mess of the 15th, starting off with Toms' tee shot into the water. Sergio Garcia and Luke Donald punish them for it as they play the percentages to go 1 up.
1650: Padraig Harrington leaves his partner Paul McGinley in all sorts of trouble as he sends his approach shooting through the green and into the crowd.
"The Americans can't get away and go three or four up. If you do that it gives confidence to the rest of the team but they just can't do it."
BBC golf commentator Mark Carnevale
1642: Europe's Paul McGinley makes a birdie putt to a huge ovation from the crowd, bringing Tiger Woods and Jim Furyk back to within striking distance. The US pairing now have a 1 up lead.
1637: Luke Donald has a long putt, but leaves it horribly short of the hole - at least 12 feet shy of his intended target. David Toms, adrenaline pumping from his success at the last hole, sends his effort well past the cup.
Both second putts - from Phil Mickelson and Sergio Garcia stay out - and the hole is halved.
1629: David Toms' putter is in the groove now. He pumps his fist after his perfectly-weighted putt brings him and Phil Mickelson all square. Reports of the demise of the US team appear to have been somewhat exaggerated.
1628: Colin Montgomerie strikes back for Europe, making no mistake with a six foot putt to bring the match with Chad Campbell and Vaughn Taylor all square again.
1623: Zach Johnson putted like a dream in the morning fourballs, but it's more of a nightmare for him in the foursomes as he misses a simple chance to cut the gap against Paul Casey and keep the US momentum going.
1615: After a few hours with nothing much to cheer about, the "U-S-A, U-S-A" chants are back with a vengeance.
David Toms and Phil Mickelson birdie the 12th to cut the gap in their match against Sergio Garcia and Luke Donald, with Europe now winning 1 up.
1606: David Toms, who hit Sergio Garcia's dad on Friday, is at it again. A meaty drive connects with a lady's head on the 11th fairway - but there is no major damage, thankfully.
She uses a handkerchief to stem the flow of blood and is all smiles when Phil Mickelson and Toms sign a glove for her. Surely there are easier ways of getting signed merchandise though?
1605: More encouragement for the beleaguered US squad as Tiger Woods and Jim Furyk go 2 up over Paul McGinley and Padraig Harrington. McGinley misses a six foot putt to halve the hole but the real damage had already been done by his shot to the green which came up well short.
"I don't know if I could have taken the beating you guys would have given me with the way the Americans are playing but they are starting to fight back a little bit."
Jay Townsend, who was due to be part of the Five Live commentary team, is relieved to miss out
1603: The US team show there is still plenty of life left in this Ryder Cup contest yet as a Lee Westwood putt from six feet lips out to allow Vaughn Taylor and Chad Campbell to go 1 up.
1559: After his heartwarming heroics for Europe so far, bookmakers report Darren Clarke is now 4-1 second favourite behind Zara Phillips (13-8) to win the BBC Sports Personality of the Year award.
1550: After Tiger Woods' approach gave him the opportunity, Jim Furyk capitalises with a well-judged putt. Luke Donald still has the chance to putt for the half but he misses to give the US a much-needed lead. The US go 1 up in the match, the only US red on the scoreboard at the moment.
1548: David Howell and Paul Casey's purple patch (or should that be lilac patch?) shows no sign of abating. A par is enough to take them 4 up after just five holes.
1546: Europe's Colin Montgomerie chips in brilliantly to negate the effect of Vaughn Taylor's beautiful putt at the 9th and keep the match all square.
1544: Vaughn Taylor sends a long-range putt straight into the middle of the hole at the 9th. Did US captain Tom Lehman miss a trick by keeping the rookie out of the action until the Saturday afternoon?
1542: Could things just be turning Tiger Woods' way? After knocking in a birdie at the last, he plays a delightful approach at the fourth to give Jim Furyk every chance of a birdie.
"The Americans might be inexperienced but they are a strong side, so don't write them off."
BBC golf commentator Andrew Murray on Radio Five Live
1535: It's almost all Europe at the K Club. Paul Casey and David Howell claim a commanding 3 up lead as they birdie their third hole in a row.
1534: Luke Donald and Sergio Garcia go 2 up as the Englishman knocks in another putt. The European pair are on fire with an adoring home crowd behind them.
1531: Tiger Woods strokes home a 10-foot putt for a confidence-boosting birdie, but it proves to be only good enough for a half of the hole as Padraig Harrington follows it with a lovely putt of his own. That sums up Tiger's day so far.
1525: Some much-needed good news for the US as Chad Campbell and Vaughn Taylor bring the match back to all square. Colin Montgomerie and Lee Westwood bogey the seventh, meaning par is enough for the US pair.
1520: Nothing much is going right for the US. Paul Casey and David Howell go 2 up in their match. The Americans need to get something going pretty sharpish if the match is not to spiral out of control before Sunday's singles.
1518: If you're an American fan, you might want to look away now. The US go 1 down in another match as Sergio Garcia and Luke Donald grab the initiative in their match. Toms' temper tantrum earlier in the hole turns out to be appropriate as the US pair make a mess of things to let Europe in.
1516: Colin Montgomerie and Lee Westwood are back to a 1 up lead as another Chad Campbell putt - this one to halve the hole - comes up well short.
1515: Paul Casey holes a 15 foot putt at the second, forcing Stewart Cink to try to make an even longer putt to halve the hole. Cink's putt is off-line, and Europe go 1 up.
1514: Fashion update: In an extraordinary turn of events, Europe have gone for lilac shirts for the afternoon foursomes. Is that a good move after neutral blues and greens have served them so well thus far? We shall see, but the US team are playing it safe, sticking to their morning outfit of light blue shirts and dark blue sweaters.
1505: David Toms is an angry man after his attempted chip from five or six yards off the edge of the green comes to rest still off the green. The US star takes out his frustrations on the grass, hacking his club into the ground several times.
It's hardly Pete Townsend smashing up his guitar on stage with The Who but it's surely bad form on the golf course.
1500: Which Tiger Woods will we see in the last match of the day? The one who has been slumped over playing partner Jim Furyk's back in a lame K Club display or the one who normally dominates tournament golf, sweeping all before him aside? We'll find out soon... Woods and Furyk are under way against the reunited Irish pair of Padraig Harrington and Paul McGinley.
1457: Poor putting prevails on the 1st green and the result is that third foursome stays level.
1448: It's all square in the Montgomerie match, following a timely birdie from rookie Vaughn Taylor.
1446: After a little break to give some players the chance to change their sodden clothes, the third foursomes starts up with David Howell driving for Europe.
1432: Chad Campbell is very annoyed with himself, as well he might be. For the second hole in a row, his putting lets him down as he misses the opportunity to hit back at the third for the US.
1425: Colin Montgomerie and Lee Westwood take first blood in their foursomes as they go 1 up. Chad Campbell's putt is too tentative and Westwood makes it look easy to set Europe on their way.
1422: US captain Tom Lehman says he was never in the slightest doubt about whether to play the clearly struggling Tiger Woods in the foursomes.
"I don't know how you could ever sit down the best player in the world - it's impossible," said Lehman.
1413: Colin Montgomerie is straight into the action in his foursomes match alongside Lee Westwood, but his putt to win the opener against Chad Campbell and Vaughn Taylor never really threatens the hole.
USA WIN: Forget Tiger Woods and Phil Mickelson, Zach Johnson has been the main man for team USA. He holes from off the 17th green to seal a 2&1 win for him and Scott Verplank against Padraig Harrington and Henrik Stenson.
1402: There are huge cheers at the 1st tee because Colin Montgomerie is back after a morning rest. He is playing alongside Lee Westwood (who is wet and weary) against Chad Campbell and Vaughn Taylor, who finally gets his chance.
1400: On 17, all four golfers take aim at the pin after four cracking drives. Scott Verplank goes closest, but Robert Karlsson is unlucky. His ball pitches a matter of feet from the pin before being swept backwards by the spin. Europe still have a pair of putts for birdie.
1353: It's bunker to bunker for Europe's first foursomes pair. Sergio Garcia has a rare lapse hoiking the ball from a sandy lie into the greenside bunker. Advantage USA. But not for long... Luke Donald plays a superb shot and David Toms misses a birdie putt as the score stays level.
1345: But the Americans are struggling to hold on... Padraig Harrington holes a jittery putt on the 16th to cut Europe's deficit to 1 down. Meanwhile, David Toms gets the afternoon foursomes under way. He is playing with Phil Mickelson against Luke Donald and Sergio Garcia, who must have had about 10 minutes rest between games.
1340: There is only one match still out on the course, that of Zach Johnson and Scott Verplank versus Padraig Harrington and Henrik Stenson. The Americans lead this one 2 up with three to play and must hold on to keep this Ryder Cup close.
MATCH DRAWN: This is a big moment in the 2006 Ryder Cup. Stewart Cink narrowly misses with a birdie putt on 18 that would have won the USA the match and then his playing partner JJ Henry does the same. Up steps Paul Casey for his chance to win the hole and half the match and the Englishman coolly strokes the ball in from six feet.
1325: High tension at the 18th green. JJ Henry puts too much pace on his eagle putt and that gives Paul Casey a tough eagle chance to win the hole. But his putt wanders on past the hole as well.
1318: Another minute, another chip in for Europe. This time Padraig Harrington holes out, but so too does in-form Zach Johnson to halve the hole. Johnson has been an unlikely hero for the USA.
EUROPE WIN: Did I say trouble? Darren Clarke holes his chip from the edge of the green and - just like that - the match is over. Europe win 3&2 over Tiger Woods and Jim Furyk.
1310: More trouble for Darren Clarke and Lee Westwood on 16. Clarke is unable to find the green and Westwood finds only water as Tiger Woods and Jim Furyk look favourite to prolong this match still further.
1303: Up ahead, the USA strike a major blow back when JJ Henry's wonderful approach shot to 17 is conceded and Robert Karlsson misses his putt. From one behind, the USA are now 1 up.
EUROPE WIN: Sergio Garcia flops his bunker shot to the pinside and Phil Mickelson and Chris DiMarco concede the match. To the musical accompaniment of "ole, ole, ole, ole", Garcia lobs his ball into the crowd. The young Spaniard has won eight Ryder Cup points in a row and 13 of 18 matches in total.
1258: Alarm bells are ringing at 17, where JJ Henry punches his approach to within a few feet of the pin. Europe may now lose a match they looked destined to win.
1250: Jim Furyk holes a pressure putt to keep his match alive, but for how long? Europe are still 3 up with three to play and it's raining really hard.
AFTERNOON PAIRINGS: The foursome line-ups are announced, with US captain Tom Lehman retaining his faith in Tiger Woods. Phil Mickelson will also be out again despite his indifferent form.
Saturday's foursomes (All times BST, subject to change)
1330 Sergio Garcia/Luke Donald (EUR) v Phil Mickelson/David Toms (USA)
1345 Colin Montgomerie/Lee Westwood (EUR) v Chad Campbell/Vaughn Taylor (USA)
1400 Paul Casey/David Howell (EUR) v Stewart Cink/Zach Johnson (USA)
1415 Padraig Harrington/Paul McGinley (EUR) v Tiger Woods/Jim Furyk(USA)
1245: News just in... Tiger Woods and Phil Mickelson will play in the afternoon foursomes despite their atrocious form. But they won't be playing together. More soon.
1241: A big development on the 16th, where JJ Henry eagles to put the USA all square with European pair Paul Casey and Robert Karlsson.
1236: What do you know? Tiger Woods blasts his drive at the 15th into the water. That wasn't anywhere near to falling on land.
1231: Lee Westwood makes a fantastic long putt on the 14th and suddenly he and Darren Clarke are 4 up with four to play. Europe can smell their first Saturday point now.
1228: Back in the first group, Robert Karlsson plays a brave second to the par-five 16th and is on in two. But he faces a monstrous putt for eagle.
1219: Note to self, don't tempt fate... Phil Mickelson drills in a birdie putt to win back a hole for the USA. But Sergio Garcia and Jose Maria Olazabal are still 3 up.
1215: The pairings for the afternoon foursomes are due to be announced in 30 minutes.
1212: As Tiger Woods continues to labour, Phil Mickelson is birdie-less through 13 holes. That is almost unthinkable. How can America's two biggest names be misfiring so spectacularly?
1208: It's all gone quiet in the lead match. Europeans Paul Casey and Robert Karlsson and Americans Stewart Cink and JJ Henry have been cancelling each other out for the last few holes. But at only 1 up to Europe, this match could yet swing the other way.
1158: "To drop Tiger or not to drop Tiger?" That's the debate being had in the K Club press area.
"There's no way you can drop Tiger. I don't care if he's struggling, he's the best golfer in the world."
BBC golf commentator Mark Carnevale on Tom Lehman's dilemma
1155: Cherished good news for team USA. Zach Johnson lands another birdie to help his pairing go 2 up in the final match.
"The weather is not doing the Irish Tourist Board much good - it's absolutely wretched."
BBC Five Live presenter John Inverdale at the K Club
1150: Did I say it was raining? Correct that, it's bucketing down and Tiger Woods gets drenched (to add to his woes) as he tees off at the par-three 12. He responds by drilling the ball close to the pin.
1146: Darren Clarke makes his putt to increase Europe's lead to 3 up in the third match. As things stand, the hosts would carry a four-point lead to lunch.
1143: Garcia almost falls into the water hazard at the 12th trying to play his ball from a perilous lie. But he doesn't and he bobbles the ball up onto the green. Speaking of water, it's raining again.
"Michael Jordan's here but no-one can inspire Woods and Furyk - the world number one and three have not managed to win a hole today. Can you believe it?"
BBC commentator Mark Pougatch
1138: Darren Clarke plays a gem of a shot from an awkward lie at the 11th to put himself in prime position for a birdie. But where is the good news for the USA? The answer is there is none.
1128: The lead quartet is on the 12th green and Paul Casey and Stewart Cink go head-to-head for birdies. Neither make the grade and the match stays as it was at 1 up to Europe.
1112: Jose Maria Olazabal is playing his part in the Spanish charge. His birdie puts Europe 4 up and Sergio Garcia helps his senior partner to conserve his strength by rushing to pick the ball out of the hole. Now that is team work!
1107: Tiger Woods throws his putter away in disgust after missing a five footer at the 9th. Things are going from bad to worse for the best golfer of a generation. But there is better news for the USA in the last group, where erratic putting hands Zach Johnson and Scott Verplank a 1 up lead.
1058: Stewart Cink birdies the 10th to reduce the USA's deficit to 1 down, but it is only a glimmer of light for captain Tom Lehman.
1054: The last time any team won all four fourballs in a single session was in 1989, when Europe earned that distinction. Could they emulate that feat in 2006?
1050: Sergio Garcia can do no wrong. He holes his eight footer to birdie again and Europe now lead 3 up.
"Tiger has a face like thunder."
BBC Five Live presenter Mark Pougatch at the K Club
1047: Tiger Woods doesn't have a birdie to his name on Saturday and has only eight in more than 40 holes so far. Normally, he makes that many in a single round.
1044: There is no-one more confident at the K Club than Sergio Garcia. He shouts out "oh, you beauty" immediately after connecting with his approach to the 9th. And he is right - another excellent birdie chance awaits him.
1040: There must be some doubt over Tiger Woods' participation in the afternoon foursomes. His latest tee shot - at the par-three 8th - skews horribly wide and ends up in the bunker. It would be a brave decision by Tom Lehman to omit the world number one, but it may just happen.
1034: Europe are on a roll again, Henrik Stenson sinking a six footer to claw him and Padraig Harrington back on to terms at all square in the last match.
1031: More joy for the Spanish pair as Jose Maria Olazabal makes a 15-foot birdie to put him and Sergio Garcia 2 up.
1024: Sergio Garcia gets away with one when his tee shot at the 8th spins back off the green and nestles by a rock, perilously close to the water hazard. That shot will not have pleased his girlfriend Morgan-Leigh Norman (daughter of one Greg Norman), who is following the group.
1018: A huge cheer sounds around the K Club as Paul Casey sinks an 18 footer. The pressure is on Stewart Cink, who misses from 10 feet. Europe are 2 up.
1015: A nerveless eight footer from Darren Clarke protects Europe's lead in the third fourballs match.
1010: Padraig Harrington rolls in a long putt, but Zach Johnson, who is playing as well as anyone on the course right now, nails a clutch 10 footer in response. Their match is still 1 up for the USA.
1000: Great teamwork from the Spanish duo. Jose Maria Olazabal holes a long par putt to give Sergio Garcia a free run at his birdie putt. For once though, Garcia misses his cue.
0957: Darren Clarke converts his birdie chance to compound Tiger Woods' troubles as the Europeans go 2 up. Zach Johnson is on fire in the last group - his long putt maintains America's lead despite the best efforts of Padraig Harrington.
0954: Two European wonder shots to report. Sergio Garcia digs his ball out of deep rough to land on the 6th green and Padraig Harrington chips to within three feet at the 4th.
0950: More magic from Darren Clarke, who looks as fresh as a daisy despite not playing much golf lately. His approach to the 5th is within five feet. But there is bad news for Europe on the 6th as a missed Casey putt loses the hole and reduces the lead to 1 up.
"Furyk must have very sore shoulders after carrying Woods around this course."
BBC commentator Mark Pougatch
0945: Dear oh dear, Tiger Woods is having a nightmare. He slices his tee shot at the 5th deep into the trees and holds his head in his hands. The world number one looks out of sorts and disconsolate.
0938: Darren Clarke drains a six footer and this time Jim Furyk has no answer. So Europe are 1 up in the glamour group.
"I have as many friends on the European team as the American one so it's hard for me to root for any side."
Paul Casey's American coach Peter Kostis
0935: Tiger Woods continues to explore the remoter corners of this K Club course. This time he is forced to punch out on to the back of the 4th green after landing his second shot to the par five flush behind a large tree.
0923: The Spanish Armada is afloat again, this time old stager Jose Maria Olazabal gets up and down with a sublime sand shot to put Europe 1 up.
0918: The birdie chance goes begging for Lee Westwood, but Henrik Stenson chips in at the 2nd to earn a half in the final group.
0914: Paul Casey makes birdie on 4 to put Europe 2 up in the first match.
0909: America strike back. Zach Johnson drains a birdie putt to win the 1st hole in the final match and go 1 up. Meanwhile, Lee Westwood continues to pepper the pin at the third and has a great birdie chance.
0905: A bit of housekeeping... Ryder Cup officials have stuck with preferred lies for Saturday's morning fourballs with more rain forecast. This means a ball may be lifted without penalty and cleaned.
"Traditionally the Americans are stronger in the singles so Woosnam will want a lead to take into the final day."
BBC golf commentator Iain Carter
0900: Chris DiMarco is not about to let his Spanish rivals get away. He responds to Sergio Garcia's birdie win with a long putt of his own at the 3rd to restore the match to all square.
0852: More brilliance from the irrepressible Sergio Garcia, who birdies the 2nd to put Europe 1 up.
0849: All four pairings are up and running as Lee Westwood holes his birdie. But the rock-solid Jim Furyk responds to halve the hole.
0840: A beautiful approach from Lee Westwood comes to rest within five feet of the 1st pin. The umbrellas are up again and it's raining quite steadily.
0835: Robert Karlsson chips in for birdie at the 2nd hole to give Europe first blood on day one. He and Paul Casey are 1 up.
0828: Here we go again - the crowd volume hits a new high as Darren Clarke makes his way to the 1st tee with Lee Westwood, Tiger Woods and Jim Furyk. If there was a roof on the K Club, it would have been blown off.
0820: Missed putts all round from group one as the 1st hole is halved in par four.
0816: Fashion update: Call day two of the Ryder Cup the "battle of blue". Team USA are clad in light blue shirts and sleeveless dark blue sweaters. Team Europe favour natty light blue striped shirts and light blue sleeveless sweaters.
0812: It's all smiles from Spaniards Jose Maria Olazabal and Sergio Garcia as they head towards the official tournament starter. Meanwhile, on the 1st green, rookies JJ Henry and Robert Karlsson are in the best shape.
0800: The umbrellas are back down and Paul Casey and Robert Karlsson stride purposefully up to the 1st tee to play JJ Henry and Stewart Cink. With one booming drive from Henry, we are under way.
0750: The umbrellas are out on the practice tee. An ominous sign?
0730: Welcome back. Day two of the 36th Ryder Cup is 30 minutes away and Europe have a two-point advantage after first-day heroics from Sergio Garcia. The weather at the K Club looks unpredictable, so don't rule out some delays. But we said that on Friday and sunny skies prevailed.