Latest: Australia 301-6 (50 overs) v Namibia 45 all out (13.5 overs)
Glenn McGrath recorded his best-ever one-day international figures with seven for 15 as Namibia were bowled out for 45.
The 256-run win means Australia have equalled the record 11 straight World Cup victories.
14th over: Bichel takes the final two wickets when he dismisses Van Schoor for six and Van Vuuren for a duck.
13th over: McGrath's best one-day bowling figures improve as he bowls Bjorn Kotze for a duck.
13th over: McGrath grabs a career-best six wickets after wicketkeeper Gilchrist makes a diving catch of Kotze
11th over: Another wicket for McGrath as Louis Burger is caught behind by Adam Gilchrist.Namibia: 34-6
10th over: Louis Burger and captain Deon Kotze fend off Lee to grab five more runs.
9th over: McGrath once again finds movement off the seam as he bowls out Keulder for his fourth wicket. Namibia: 28-5
8th over: Keulder gets some rare runs for Namibia as he hits a four to the fine leg boundary.
7th over: Gavin Murgatroyd becomes McGrath's third wicket as the umpire gives lbw.Namibia: 17-4
6th over: Danie Keulder is feeling the pressure, having failed to score off 11 deliveries so far.
5th over: Namibia lose their third wicket as the umpire rules that Morne Karg was caught behind, despite the fact McGrath's delivery glanced off Karg's glove which was not on the bat handle Namibia: 16-3
4th over: Lee claims Australia's second wicket as Swanepoel's nicked shot into the air gives Ponting his second catch at second slip.Namibia: 14-2
3rd over: McGrath is in typically miserly form as he gets his first maiden.
2nd over: Stefan Swanepoel looks nervy as he attempts to get to grips the speed of Brett Lee's deliveries, mustering just two runs off the over.
1st over: Namibia are already in trouble as Glen McGrath claims his first wicket with Ponting at second slip taking an easy catch from Jan-Berry Burger's nicked shot. Namibia: 5-1
50th over: Lehmann swings his bat in the final over and hits 28 runs off the over to bring up his 50 as Australia make 301-6.
49th over: Van Rooi bowls the penultimate over and frustrates the batsmen with some clever deliveries but his final ball goes for four.
48th over: Lehmann clubs a six off Van Vuuren to the delight of the crowd.
47th: Lehmann and Hogg keep the score ticking over with three singles.
46th over: Van Vuuren comes back to bowl and Hogg hits a four with the final ball.
45th over: Brad Hogg plays to fine leg boundary for his first four.
44th over: Darren Lehmann smashes through cover for his first boundary.
43rd over: Symonds' charge is halted by a run-out after he is left stranded in the middle when Martyn refuses to go for a second run. Australia: 230-5 Australia suffer their second blow in the over when Martyn is bowled by Bjorn Kotze. Australia: 231-6
41st over: Symonds passes the half-century mark.
40th over: Martyn breathes a sigh of relief when the bails refuse to fall after the ball brushes past his bat into the stumps.
39th over: Symonds pulls through mid wicket for his second six.
38th over: Australia are looking comfortable as they pass the 200-mark.
37th over: Symonds is starting to cut loose in Potchefstroom, taking every opportunity to whack the ball.
35th over: A four from both Symonds and Martyn keep the run rate up for Australia.
34th over: Symonds smashes van Vuuren's short delivery over midwicket for his first six.
33rd over: Martyn is working hard, grabbing five off the over.
32nd over: Van Vuuren bowls one of his more successful overs, conceding just one run to Martyn.
31st over: Symonds smashes the ball to the long on boundary, almost hitting Martyn on the way, for his first four.
30th over: Louis Burger is still enjoying himself, restricting Australia to just two runs off the over.
28th over: Symonds is working hard, grabbing five of the six runs off the over.
27th over: New batsman Damien Martyn is attempting to steady Australia, smashing a four through cover point.
26th over: Louis Burger is having a fantastic game, taking his third wicket as Ponting slices his delivery in the hands of Deon Kotze at backward square leg. Australia: 146-4
25th over: New batsman and captain Ricky Ponting combines with Andrew Symonds to put six runs on the over.
24th over: A nice seamer from Louis Burger takes the valuable wicket of Hayden. Australia: 144-3
22nd over: Hayden grabs his third six with a pull shot to the backward square leg boundary.
21st over: Hayden punishes Namibia for the loss of Bevan with two more fours and a six.
20th over: Another big wicket for Namibia as Bevan attempts to whip Louis Burger's ball to the right, only for the bowler to make diving catch. Australia: 104-2
19th over: Hayden goes past the half century mark as Australia reach 100, but again gets a lucky escape when his shot just clears cover.
18th over: Bevan is ably supporting Hayden as he notches up another runs during the over.
17th over: Great over for Australia as Hayden get another boundary and his first six.
15th over: Hayden breathes a sigh of relief after he narrowly escapes being run out when Stefan Swanepoel's throw just misses the stumps.
14th over: Hayden loops a shot into the air to mid wicket region, the mid on fielder runs to catch it but can't reach, allowing a single.
12th over: Hayden smashes Louis Burger through midwicket for his fourth boundary.
10th over: Bevan drives van Rooi the off side for an easy single.
9th over: New bowler Bjorn Kotze restricts Australia to just one run off the over.
8th over: Bevan smashes van Rooi through cover for his first boundary.
7th over: Big over for Australia as new batsman Michael Bevan, making his 200th ODI appearance, joins Hayden who grabs three boundaries.
6th over: Namibia strike first blood as van Rooi cleanly bowls Gilchrist with a beautiful inswinger. Australia: 26-1
5th over: Hayden and Gilchrist are moving along at a steady pace, looking untroubled by the Namibian attack as they amass another three runs from the over.
3rd over: Gilchrist pulls over midwicket for a pacey four off van Vuuren.
2nd over: Hayden pushes Burton van Rooi short third man for a single.
1st over: Adam Gilchrist and Matthew Hayden open the batting for the holders. Gilchrist signals Australia's intent by pulling a beautiful shot off Rudi van Vuuren over midwicket and is just denied a boundary after some excellent fielding from Bjorn Kotze.
0730 GMT: Australia have won the toss and elected to bat first.
Australia: Ricky Ponting (captain), Adam Gilchrist, Matthew Hayden, Damien Martyn, Darren Lehmann, Michael Bevan, Andrew Symonds, Brad Hogg, Brett Lee, Jason Gillespie, Glenn McGrath.
Namibia: Deon Kotze (capt), Jan Burger, Louis Burger, Morne Karg, Daniel Keulder, Bjorn Kotze, Gavin Murgatroyd, Stefan Swanepoel, Burton van Rooi, Melt van Schoor, Rudi van Vuuren
Umpires: Russel Tiffin (Zim) and Billy Bowden (Nzl)
TV umpire: Neil Mallender (Eng)
Match referee: Gundappa Viswanath (Ind)