Lincoln moved into the play-off places with a 2-1 win at Cheltenham, whose League One future is now hanging by a thread.
The Imps have been resurgent under boss Michael Skubala, but they had to come from behind to take the points.
Cheltenham led through Liam Sercombe’s early penalty, but Joe Taylor levelled before half-time and Freddie Draper won it seven minutes after the break.
A midweek win at Burton had kept Cheltenham’s survival hopes alive and their chances of avoiding the drop improved when Jordan Thomas was tripped by Danny Mandroiu in the box. Sercombe stepped up to fire home from the spot in the 15th minute for his 11th goal of the season.
Lincoln responded well and Taylor’s superb run down the left was eventually stopped in the box, but the ball found its way back to him and he applied a clinical finish in the 40th minute for his 22nd goal of the campaign.
Luke Southwood saved from Alex Mitchell early in the second half and also kept out an effort from Ben House, but he could do nothing to prevent Draper from scoring with a low finish in the 52nd minute.
James Olayinka saw a late effort blocked for Cheltenham and their defeat left them five points from safety with two games to play.