Media playback is not supported on this device FA Cup: Scunthorpe 2-2 Chesterfield

Jay O'Shea grabbed a late equaliser as Chesterfield battled back to earn an FA Cup replay from a pulsating third-round tie against Scunthorpe.

The Iron led thanks to on-loan Chelsea defender Alex Davey's first senior goal and it was 2-0 just before the break when Lyle Taylor ran through to net after a Ritchie Humphreys error.

Eoin Doyle's penalty - his 22nd goal this season - gave the visitors hope.

And O'Shea struck to make it 2-2 from a Gary Roberts cross to earn a replay.

The Spireites, who had to beat MK Dons twice because of an administrative error to reach this stage, showed great spirit to finally break stubborn home resistance and find a way past inspired home keeper Sam Slocombe.

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After Davey smashed in a superb opener from the edge of the box, Slocombe made fine saves from Doyle and Armand Gnanduillet to keep the hosts ahead.

But a careless back header by Humphreys gifted Scunthorpe a second goal, Taylor showing great composure to run through and beat Tommy Lee.

Chesterfield continued to have the upper hand after the interval, forcing more heroics from Slocombe, who denied Gnanduillet, Sam Clucas and Roberts.

However, Doyle struck from the penalty spot after Roberts was fouled to make it 2-1.

Then, with five minutes left, O'Shea converted Roberts' cross from 10 yards to ensure both sides can still reach the fourth round, where a tie at Championship side Derby County awaits.