Women's Private Greens' champions, Stylux Cup and Irish Cup holders Knock suffered an early setback in their quest to remain at the top when they lost 1-6 at Falls in the League.
It was a major upset — and the teams meet again in the McMaster Cup - in what has been a topsy turvey season after only three weeks.
Falls only dropped half-a-point on the opening day at Crawfordsburn, but lost 1-6 at Cavehill before shocking Knock. Cavehill took all seven points at Mossley, beat Falls 6-1 but only managed half-a-point at Crawfordsburn.
Ards, who lost their first two matches took three points at home to Ewarts, 12 points from two matches before this, which all means Belmont take the early lead. Knock juniors did create a surprise with a 4-1 win over Owenbeg.
There was also a major upset in the NIWBA Senior League when Lurgan beat Divis 5-2. Divis are one of the top teams and had only dropped a point in their first two games, while Lurgan lost 3-4 to Whitehead with four players short, but then went down 2-5 at Wingrave. Perennial title winners, Dungannon, could only manage 5.5 points at home to Ballyholme.
The Saturday Morning Rinks League failed to get started because of the heavy rain but should now get under way at Larne.
NIWBA League Senior: Antrim Lawn 5, Wingrave 2; Banbridge 3.5, Newcastle 3.5; Dungannon 5.5, Ballyholme 1.5; Gilnahirk v Donaghadee postponed; Holywood 6, Carrick 1; Lurgan 5, Divis 2; Portadown 0, Whitehead 7; Ward Park 6, Ardenlee 1.
Junior: Castle Park 4, Lagan Valley 1; Clarendon 0, Newry 5; Divis 0, Curran 5; Ward Park 0, Dromore 5; Wedderburn 5, Ballyholme 0.
PTWBA Senior League: Portrush 5, Londonderry 2; Limavady 2, Magherafelt 5; Dunluce 5, Ballymena 2.