Manly fullback Brett Stewart will miss Saturday's NRL clash with Cronulla at Toyota Stadium after succumbing to a new hamstring injury.

The 26-year-old, who missed last weekend's 32-30 loss to South Sydney with a twinge to his left hamstring, has now tweaked his right one at training.

Exciting young talent Will Hopoate will move from the wing to take Stewart's spot at fullback, while Tony Williams will go onto the wing after recovering from an ankle injury.

The Sea Eagles are already without Australian and NSW representative Anthony Watmough and bench utility Terence Seu Seu, who are both serving one-match suspensions after being charged with offensive conduct for urinating in public on Sunday night.

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