Sydney Roosters earned the bragging rights over rivals South Sydney Rabbitohs with a 20-6 victory to maintain their perfect start to the NRL season.
The Roosters did not hit top form in beating Penrith Panthers last week but were more convincing on their trip to ANZ Stadium in one of rugby league's oldest rivalries.
It was a fast start for Trent Robinson's men as some fine work along the backline led to Latrell Mitchell touching down for a fifth try in just four matches in the fifth minute.
A second try arrived just seven minutes later when Joseph Manu's sublime pass inside played in Michael Gordon.
The Rabbitohs, hindered by the loss of suspended trio George Burgess, Hymel Hunt and Braidon Burns, pushed in search of a reply, but the Roosters defended resolutely and a Gordon penalty made it 14-0 by the break.
Pressure did yield points for the Rabbitohs when Sitiveni Moceidreke touched down in the right corner for a debut try.
Daniel Tupou, celebrating his 100th NRL appearance, had a try ruled out by the NRL Bunker before marking his landmark game with a score in the 57th minute.
That prompted another spell of pressure from the Rabbitohs, who had won their previous two matches, but too often they were wasteful with ball in hand as the Roosters clinched victory.