A first half own goal helped Sevenoaks Town clinch a SCEFl double over Fisher at Greatness Park on Saturday.
They followed up their 3-0 win at Champion Hill by keeping another clean sheet, thanks to a superb one-handed second half save by Scott Chalmers Stevens.
The Town goalkeeper produced a fine reaction stop to deny Travis Gregory as Fisher went close to pulling level.
Micky Collins gave debuts to Mike McKenna and Aaron McCallum, with three new faces on the bench.
Fisher goalkeeper Joel Hannington was in the thick of the action early on, complaining to referee Jason Down after being on the end of two painful challenges, neither of which resulted in a free kick.
Hannington then produced a fine save to deny McKenna, tipping his fierce right foot effort over the bar.
However, he had no chance in the 19th minute that ultimately decided the game. Ross Ibbertston unleashed a powerful right-foot shot which looked to be going wide, until hitting Fisher skipper Robert Curtis and landing in the opposite corner.
McKenna then went close again, heading Chan Quan's cross just wide Fisher then went close to grabbing a late equaliser in first half stoppage time when Max Rothwell hooked just wide of the far post.
Chris Edwards' second half free-kick was saved by Hannington, before Curtis produced Fisher's first shot on target.
The South London side pressed for an equaliser for most of the second half, but it was Chalmers-Stevens strong right hand which ultimately denied them any reward, on his way to a second successive home clean sheet.
Sub Adam Marsh and young left back Jack Baines, making his home debut, both picked up yellow cards.
Mr Down added on fully five minutes at the end, before Town could reflect on only their second home league win of the season.