Match ends, MK Dons 0, Chesterfield 1.
Chesterfield beat MK Dons in the second round of the FA Cup for the second time in a month to set up a third-round meeting with Scunthorpe on Tuesday.
The League One sides were forced to replay the tie after the Spireites fielded an ineligible player in their initial 1-0 win at Stadium MK.
Gary Roberts met a cross from Eoin Doyle to sweep home the winner.
Benik Afobe was lively for the Dons throughout, testing keeper Tommy Lee before firing into the side netting.
Armand Gnanduillet, who netted the only goal in the original fixture on 6 December, found the back of the net again with a header but had his effort disallowed for offside.
He also went close to doubling the visitors' advantage with a lobbed effort on 79 minutes.
While the hosts were menacing, Dean Bowditch's header off target from a Danny Green cross after the break was as close as Karl Robinson's side came to levelling.
- 7GreenSubstituted forCarruthersat 60'minutesBooked at 90mins
- 15RandallSubstituted forReevesat 45'minutesBooked at 73mins
- 9BowditchBooked at 48mins
- 17PowellSubstituted forGriggat 60'minutes
- 5MorsyBooked at 57mins
- 11RobertsBooked at 83mins
- 9GnanduilletBooked at 53mins
- Steve Martin
- Shots on Target
Second Half ends, MK Dons 0, Chesterfield 1.
Samir Carruthers (MK Dons) is shown the yellow card.
Armand Gnanduillet (Chesterfield) wins a free kick on the right wing.
Foul by Samir Carruthers (MK Dons).
Attempt missed. George Baldock (MK Dons) right footed shot from outside the box misses to the right.
Ben Reeves (MK Dons) wins a free kick on the left wing.
Foul by Ritchie Humphreys (Chesterfield).
Foul by George Baldock (MK Dons).
Sam Clucas (Chesterfield) wins a free kick on the right wing.
George Baldock (MK Dons) wins a free kick on the left wing.
Foul by Armand Gnanduillet (Chesterfield).
Foul by Benik Afobe (MK Dons).
Armand Gnanduillet (Chesterfield) wins a free kick in the attacking half.
Samir Carruthers (MK Dons) wins a free kick in the defensive half.
Foul by Gary Roberts (Chesterfield).
Foul by Ben Reeves (MK Dons).
Eoin Doyle (Chesterfield) wins a free kick in the defensive half.
Corner, MK Dons. Conceded by Sam Clucas.
Corner, MK Dons. Conceded by Eoin Doyle.