Manly Sea Eagles coach Geoff Toovey says Sydney Roosters are a big test Sonny Bill Williams trains with the Roosters at Moore Park in the lead up to tonight's big clash with the Sea Eagles.Picture: Tim Hunter Source: The Daily Telegraph THE key question in tonight's match at Allianz Stadium will centre on whether Manly have the mental and physical strength to combat and overcome a relentless Sydney Roosters. That is the opinion of Sea Eagles coach Geoff Toovey ahead of what shapes as a magnificent Monday night game between two of the premiership heavyweights. Toovey has watched the Roosters slowly but surely wear down their opponents this year with a simple yet highly effective style. "They play a simple style on the back of some quality players," Toovey told The Daily Telegraph last night. The Roosters are dominating teams through good yardage and field position. Teams have cracked this year because the Roosters are relentless. Asked if Manly's challenge was not to crack, Toovey said: "I think so. Both teams defended well last time the two teams met (in round nine, a 16-4 win by the Roosters at Brookvale). They took advantage of a couple of our mistakes and punished us. Hopefully we can put pressure on them and they make mistakes that we can capitalise on. Manly fullback Brett Stewart trained yesterday and looks certain to return from injury in tonight's game. That would push Peta Hiku out of the side. "'Snake' (Stewart) got through the session," Toovey said. We will see how he pulls up but so far, so good. I would suggest he would play. This match offers so much. Manly will send out a star-studded side that includes Jamie Lyon, Steve Matai, Anthony Watmough, David Williams, Kieran Foran, Daly Cherry-Evans and Glenn Stewart. But the Roosters have their own glamour through Sonny Bill Williams, Michael Jennings, Anthony Minichiello and Mitchell Pearce. Daniel Mortimer will replace the injured James Maloney at five-eighth. Roosters prop Jared Waerea-Hargreaves will return tonight from suspension. One interesting individual line-up will come on the wing, where David Williams meets rising Roosters star Daniel Tupou.