"He finished the year off in sizzling form. I think he's actually looking forward to starting a season where he's not encumbered by injury.
"It was a very traumatic injury in the sense that there were lots of doubts about whether he could perform at the top level again with his athleticism and whether he could reach his top speeds again.
"But I think he's worked very hard on it and the medical staff have worked very hard on it.
"He's back to his best.''
The Sea Eagles will take on Leeds this Saturday in the World Club Challenge, where Stewart will again play a major role in Manly's attack.
And Toovey admits Manly would have struggled to win last year's premiership had it not been for such a successful comeback by Stewart.
"You don't win grand finals without a potent backline,'' Toovey said.
"And we got that from the likes of Brett and Jamie Lyon. If you take a player like Brett out of that team, then it does reduce that potential.''
- AAP