Chasetown FC suffered a disappointing midweek defeat, going down 1-0 at Gresley.
Ryan Wynter had the ball in the net but that was quickly ruled out for an offside against Mitch Piggon.
Gresley lost their goalkeeper Robert Peet to a leg injury that stopped the game for eight minutes until he was stretchered off.
The hosts took a shock lead when Josh Ruff conceded a penalty and Thomas Manship fired the kick in off the post with Curtis Pond diving the right way.
Jack Langston was a fingertip away from equalising with a free kick from the edge of the box that makeshift keeper Matthew Melbourne was equal to with a spectacular save.