The Balmacewen men had their second victory in Dunedin premier tennis with a one-set countback win over last year's finalists, Eastern Harbour, on Tuesday night.
Conrad Wong led from the front with a 6-2, 6-4 win in the No 1 singles against Phil Mirfin, and Hee Bum Chang and Matt White backed him up with straight-set wins.
Alan de Zwart, the ex-Cantabrian, beat Libby Scott, who has dispensation to play in the men's competition, 6-0, 6-4.
Although Harbour won both doubles, it dropped a set in the top pair to create the winning margin.
St Clair got on the board with a 5-1 win over Taieri.
Andrew Mitchell (Taieri) led Darryl Paterson 6-2, 5-2 but went on to drop that set and the third 7-6.
The bonus point for Taieri came from newcomer Brian Hansen, who beat Mayuresh Prasad 7-5 in the third.
The Mornington-Roslyn Privateers beat the Raiders from the same club 4-2, but three matches went to 7-6 in the third.
Oliver Cuthill, back from a tennis scholarship in New Orleans, overcame some rustiness to overpower Dwayne Cleugh 6-2, 6-4 in the top single.
Mornington-Roslyn women beat Eastern Harbour 2-1, with Mary Molloy partnering her daughter, Courtney Hume, to success.
Juniors Georgia Hume and Lauren Fowler had a 3-0 win over Balmacewen.
