Copnor A & E triumphed 8-4 at Craneswater A with skipper Scott Compton, Pedro Ferguson and Lee Eden all winning. Rob Kirby and captain Andy Boulton (30 break) claimed consolation braces.
Waterlooville A look favorites to lift the silverware after drubbing Post Office 10-2.
Professional Jamie Wilson played a starring role, winning his game with breaks of 96 and 62.
Dan Wells, Richie Burnett Jnr, Frankie Jakeway and Phil Watson also won with Jamie Farrow taking a double consolation.
Bellair recovered from 2-6 down to draw against Copnor D thanks to wins from Greg Jones and Paul Jagger.
Andy Bushnell and Mick Hall had earlier claimed braces for Copnor with Bob Chino and Steve Green drawing their matches.
Craneswater R dented Bellair X’s Division 2 promotion hopes with a superb 10-2 victory.
There were individual wins for Grant Vernon, Martin Richardson, Colin Sullivan and James Sorrell.
Craneswater Q look odds on to take the crown after a 9-3 victory over North End Bowls Club with braces from Adam Gillen, Iain Russell and Tony Lee.
It was a game of two halves as Emsworth B and Waterlooville C couldn’t be separated.
Waterlooville started well with Gary Green, Gary Wilton and Dave Pink giving them a 6-0 advantage. Emsworth, though, roared back through John Bateman, John Morrison and Paul Merrett.
Emsworth claimed a 9-3 home win over Portchester X and Cowplain Z beat Waterlooville Xcels 8-4.
In the only Division 3 match, Cowplain Misfits won 7-5 at Broadoak with braces from Ray Axton, Dean Bates and Ryan Houghton.
Pompey Royals could grab runners up spot if they win their game in hand against the Misfits.