For photos from the Ballynahinch v DLSP game, please click here.
Elsewhere, former Ireland Under-21 international Stuart Philpott notched Belfast Harlequins' only try in their 10-8 success over Bective Rangers at Deramore Park.
'Quins did not have it all their own way and after Kevin McKenzie nosed Bective in front with a 71st minute, the Ulstermen needed a late penalty from Keith Pyper to seal the win.
Powerful prop Martin Gately muscled his way over for a crucial try in Highfield's 13-3 Munster derby triumph over Thomond at Woodleigh Park.
Malone also picked up an opening day win. They claimed the scalp of Greystones by taking a 16-10 verdict at a cold Gibson Park, where Gareth Fry kicked three penalties and converted a penalty try.
Wanderers came away from Rosbrien with a valuable four points. A David Burns try and a vital conversion by former Shannon man Niall McNamara helped the Dubliners beat Old Crescent 7-6.
Arguably the match of the day took place at the RDS where Lansdowne and UCC shared the spoils in an entertaining 19-19 draw.
Gavin Dunne kicked four penalties and converted Scott Deasy's try for the Cork students, who are the reigning Division Two champions.
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