Accrington Stanley 3-1 Chesterfield
Lee Molyneux hit a first-half hat-trick for 10-man Accrington Stanley to consign table-topping Chesterfield to a surprise defeat.
Molyneux scored with a low free-kick before following in when Danny Webber's penalty was saved by Tommy Lee.
Peter Murphy was sent off for a bad challenge on Spireites midfielder Dan Gardner before Molyneux wrapped up the win after poor defending.
The visitors pulled one back when Ian Evatt slotted in from close range.
Despite the defeat, the Spireites remained top of League Two, one point clear of Scunthorpe, who were held at home by Northampton.
Victory for James Beattie's side moved them six points clear of the League Two relegation zone.