CASTROL Social fought valiantly against Upton AA on Saturday but their title-chasing Chester hosts narrowly won 1-0.
A Tom Fellows strike kept Upton in the hunt for the Division One trophy,.
Elsewhere, Vauxhall Motors Reserves suffered a convincing 4-0 defeat at the hands of rivals Runcorn Town.
A Simon Burton hat-trick and a goal for Jason Carey exposed the gap between Runcorn and most other teams this season.
Another side in the title hunt, defending champions West Kirby, completed a miserable day for Port teams, defeating Ellesmere Port 1-0.
In Division Two, Capenhurst Villa fared no better, going down 3-1 at Mallaby.
Steve Abbott struck twice and Luke Hughes once for the home team. Tom McGill was on target for Villa.
On Monday night Castro Social bounced back in Division One, beating hosts Blacon YC 2-0.
Travelling Ellesmere Port saw off Cammell Laird Reserves 3-0.
In Division Two Grange Athletic lost 2-1 to Bronze Social.
Division Three saw Capenhurst Villa Reserves lose 2-1 to Pensby.