Exeter City suffered their fifth home defeat of the season tonight.
The Grecians lost 2-0 against Chesterfield - conceding both goals in the second half.
The result sends the visitors to the top of the table for 24 hours at least.
In tomorrow's League Two games, Torquay United travel to Dagenham and Redbridge, while Plymouth Argyle host Bury. In the Championship, Yeovil Town entertain Blackburn.
Yeovil Town's Championship survival hopes were severely dented last night, but Plymouth Argyle have edged closer to the League 2 play-offs.
All three of Devon's Football League teams suffered defeats, but Yeovil's Championship survival battle received a boost at Blackpool.
Exeter's Gareth Steenson missed a conversion attempt with the last kick of the match as Gloucester won 14-13 at Sandy Park.