Wanderers led from start to finish and prevailed 19-10 over Merewether Carlton in Saturday’s season opener at No.2 Sportsground.
The Two Blues scored the only eight points in the second half after leading the Greens 11-10 at the break.
The hosts got in front 8-0 midway through the first term before the visitors reduced the margin to one on the half hour mark.
Elsewhere in round one of Newcastle and Hunter Rugby Union and Hamilton started their quest for a premiership three-peat by running in eight tries as part of a 52-15 victory over The Waratahs at Passmore Oval.
Southern Beaches scored on the bell to defeat Maitland 22-20 at Marcellin Park, University edged out Nelson Bay 16-10 at Bernie Curran Oval and Lake Macquarie eased past Singleton 39-15 at Walters Park.