Michael Chambers scored an 85th-minute winner for Dulwich Hamlet as they won 3-2 against Burgess Hill Town at Champion Hill.
Nathan Ferguson and Nyren Clunis also netted for the Bostik League Premier Division promotion-chasers in front of a crowd of 1,971.
Hamlet are unbeaten in eight matches.
Tooting & Mitcham made it three straight league wins with a 2-1 success at Tonbridge Angels. Omar Folkes and a 59th-minute own goal settled the contest.