Ritchie Humphreys' first goal of the season was enough to maintain Chesterfield's four-point lead at the top of Sky Bet League 2 with a hard-fought 1-0 win at Oxford United.
Veteran Humphreys finished off a pass from Eoin Doyle on the half-hour to clinch victory in a clash between the two sides who started the day first and second in the table.
The Us fought hard for an equaliser but their hopes were hit by the 67th-minute dismissal of Andrew Whing for a foul on Doyle.
Fleetwood Town took advantage to move up to second place as Jamille Matt scored the only goal of the game to earn the Cod Army a 1-0 win over Portsmouth at Fratton Park.
And AFC Wimbledon's fine start continued with a 3-1 victory over 10-man Burton Albion, who had shrugged off the early dismissal of Marcus Holness to grab a 29th-minute lead through Adam McGurk.
The home side hit back after the break with Harry Pell equalising before Jack Midson and Andy Frampton sealed the win.
Improving Mansfield Town piled more pressure on Northampton Town boss Aidy Boothroyd after breezing to a 3-0 success at the One Call Stadium.
Ben Hutchinson's free-kick opened the scoring on 11 minutes and Sam Clucas added a second before a 65th-minute own goal from Mathias Kuou-Doumbe sealed the Cobblers' fate.
But Accrington Stanley remain the only team in the division without a win after they fell to a 2-1 home loss against Rochdale.
Matthew Lund and Scott Hogan put the visitors well in command inside the first 13 minutes and, despite Kayode Odejayi reducing the deficit and the visitors having George Donnelly sent off three minutes into the second half, the hosts could not fashion an equaliser.
Hartlepool United's steady improvement continued but they were denied victory at Bristol Rovers by a last-gasp equaliser from John-Joe O'Toole.
Matt Harrold gave Rovers a 35th-minute lead but two goals from Luke James late in the first half put the visitors in front before O'Toole fired home late on to seal a 2-2 draw.
Exeter City stumbled to a 2-0 defeat at home to Newport County, whose goals came from Conor Washington and Harry Worley.
Etienne Esajas scored the only goal of the game in the 62nd minute as Scunthorpe United beat Plymouth Argyle 1-0 at Glanford Park, while Dean Morgan's 70th-minute equaliser grabbed a 1-1 draw for Wycombe at home to York City, who had opened the scoring six minutes earlier through David McGurk.
Callum Ball scored twice as Torquay United overcome Cheltenham Town in a six-goal thriller at Plainmoor.
Ball twice gave the Gulls the lead only to see Byron Harrison and Terry Gornell claw the visitors back level, but Karl Hawley restored Torquay's lead for the third time in the 65th minute and Jordan Chapell completed a 4-2 win at the death.
Rhys Murphy earned a last-minute point for Dagenham and Redbridge in a 2-2 draw at Morecambe.
Abu Ogogo gave the Daggers the lead but goals from Padraig Amond and Mark Hughes looked to have won it for the home side until Murphy popped up with seconds to spare.
And there was an equally dramatic finish at Gigg Lane where Ben Coker looked to have earned Southend United the three points until Anton Forrester's 90th-minute header secured a 1-1 draw for Bury.
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