Manly have secured the outright lead at the top of the NRL ladder courtesy of a 21-12 win over St George Illawarra on Monday night.

In the final game of the NRL’s Rise For Alex round in front of 10,530 fans at Kogarah Oval, the Sea Eagles’ four-tries-to-two victory was spearheaded by Brett Stewart.

The Manly No.1 threw the final pass for two Manly tries and launched raids on the Dragons’ right-hand side defence all night.

The Dragons matched Manly for much of the opening 20 minutes with some enterprising football, before the visitors scored two tries in three minutes to spirit away to a 10-2 lead after 23 minutes.

Benji Marshall prised open the Sea Eagles defence just before halftime to give the Dragons some hope of an upset but in the second half it was all Manly.

Tom Symonds crashed over off a Daly Cherry-Evans pass in the 54th minute before Jorge Taufua forced his way over out wide off a Stewart pass six minutes later.

Cherry-Evans sealed the win with a 76th-minute field goal, before Jason Nightingale scored a late consolation try in acrobatic style for the home side.

After co-competition leaders Penrith and Canterbury suffered losses on the weekend, Manly sit alone atop the NRL ladder on 28 points.

After a disappointing effort following four wins in their last five starts, the Dragons sit a win outside the eight on 20 points, with Josh Dugan their best.