Chris Atkinson scored in stoppage time as Chesterfield came from behind to beat Oxford United in League Two.
Chesterfield keeper Tommy Lee returned to the side after two months out, but was beaten within the first minute by John Mullins's back-post header.
Lee then made a flying save from Jake Forster-Caskey's header but the hosts levelled on the stroke of half-time as Liam Cooper fired in from 12 yards.
Atkinson won it in stoppage-time as he slid a low shot inside the far post.
VIEW FROM THE DRESSING ROOM
Chesterfield manager Paul Cook told BBC Radio Sheffield:
"Again we made it a difficult game.
"We work so hard on not conceding an early goal, at the minute we can't but help concede an early goal. You wouldn't think we've worked all week.
"I thought the players showed great courage. Its hard to be patience in football but to come back and score two goals is a great testament to the players."
Chesterfield 01 Lee 03 Smith Booked 06 Hird 12 Darwikwa 31 Cooper Booked 08 Togwell 10 Whitaker (Boa Morte - 82' ) 17 Atkinson 25 Talbot 18 Boden (Richards - 67' ) 38 Dickenson (Lester - 74' ) Substitutes 13 O'Donnell 04 Forbes 16 Ridehalgh 15 Clay 09 Richards 14 Lester 37 Boa Morte Oxford United 01 Clarke 06 Wright 16 Whing Booked 17 Capaldi 25 Mullins 08 Heslop (Pittman - 61' ) 18 Forster-Caskey (Rigg - 60' ) 19 Cox Booked 20 Leven 09 Constable 15 Potter (Chapman - 90' ) Substitutes 21 Brown 04 Raynes 23 O'Brien 07 Chapman 14 Rigg 11 Pittman 28 Marsh