Dylan Walker's double consigned Sydney Roosters to a first NRL defeat of the season as the in-form Manly Sea Eagles won a thriller 18-12 before North Queensland Cowboys beat South Sydney Rabbitohs to go joint-top.
Manly stretched their winning run to three games and are now fourth in the ladder after Walker's late try settled a gripping contest at Allianz Stadium on Friday.
Centre Walker slotted over an early penalty, but the Roosters led after Shaun Kenny-Dowall took a superb pass from Luke Keary to go over for the opening try, which Michael Gordon converted.
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Manly were deservedly level 18 minutes in, when Jorge Taufua dived over in the corner after he was expertly picked out by Tom Trbojevic to make it 6-6 at the break.
Akuila Uate had a try ruled out as he had a foot in touch, but Walker showed a sharp turn of foot to get on the end of Blake Green's grubber to score his first four-pointer of the night and added the extras.
Mitchell Pearce powered his way over for a score which Gordon converted to level with nine minutes to play, but it was Walker who had the final say, racing onto a brilliant pass from Brian Kelly before surging away for a decisive try and landing his conversion to put the icing on the cake.
The Cowboys joined the Roosters and Melbourne Storm - who face Penrith Panthers on Saturday - on eight points with a 20-6 victory over the Rabbitohs.
First-half tries from Michael Morgan and Gideon Gela-Mosby, the latter of which rounded off a slick move, as well as six points from the boot of Johnathan Thurston gave Paul Green's men a 14-0 advantage at the break.
Robert Jennings' converted try got the Bunnies back in it, but they were unable to respond to their derby defeat to the Roosters with a win as Shaun Fensom added a third try for the Cowboys, who now have four wins from five.