Hartlepool suffered a fifth consecutive defeat as they were beaten 2-1 by promotion-chasing Chesterfield at Victoria Park.
Colin Cooper's side now sit just three points above the bottom three after a run of one win in eight games.
The Spireites had to come from behind to earn their ninth away win of the season - a result which took them five points clear of Fleetwood in the race for automatic promotion.
Pools took the lead in the 25th minute. Jack Barmby's pass fed Luke James in behind left-back Nathan Smith and the striker neatly curled in his 16th goal of the season from inside the penalty area.
The lead, however, lasted just five minutes.
A Dan Gardner corner landed in the six-yard area and centre-half Liam Cooper was on hand to knock the ball over the line.
The Spireites scored what proved to be the winner four minutes into the second half.
A crossfield ball from Marc Richards found Eoin Doyle at the far side of the penalty area and he cut inside before angling a deft chip over keeper Andy Rafferty and high into the net.
The visitors saw the game out comfortably and could have added to their lead, but substitute Armand Gnanduillet's low, angled shot was well saved by Rafferty.