The Melbourne Storm have regained the favourites tag to win the National Rugby League premiership with a 17-4 win over St George Illawarra at Etihad stadium.
Both teams were unbeaten before this fourth round match, but Melbourne had not looked convincing so far this season.
The home side led 4-0 at half time, thanks to two penalties, kicked by Cameron Smith.
Man of the match was Storm's Bill Slater, whose try in the 67th minute effectively sealed the win.
In the night game, the Roosters thrashed Brisbane 25-6 in Sydney.
The other unbeaten team this season, the Gold Coast Titans, travel to North Queensland on Sunday while the Warriors play the Sea Eagles at Mount Smart Stadium on Sunday afternoon.