Experienced Knights forward Aidan Guerra should be back for the final four or five rounds of the premiership after undergoing surgery on Monday to repair a fractured and dislocated ankle.
Knights coach Nathan Brown said Guerra faces four months on the sideline after suffering the injury late in his side's 26-18 loss to Manly last weekend but admitted initially, the club feared the injury could have been even worse.
"He got operated on yesterday. He's going to be roughly four months they are saying at this stage," Brown said on Tuesday.
"It could have been a lot worse. Obviously, it could have been a little better and not happen. The initial fears when he first did it were a bit worse so around the four month mark they are tipping."
Brown said he is confident Guerra 31, will make a full recovery.
"They're unfortunate ones. North Queensland had a very bad one as well [last weekend]," he said.
"It's a tough game and you don't like it to happen and no-one likes to see it happen to anyone, especially one of your own teammates.
"As it's turned out, it's not the worse case it could have been. Aidan will look after himself well, he'll recover well. He's got a young wife and a couple of young kids at home to keep a good eye on him and he'll probably ship his mum and dad down too at some stage knowing Aidan.
"He'll be in good hands and we've got a good staff who will look after him."
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Brown has named Sione Mata'utia on an extended bench for Sunday's clash with Gold Coast but he is no certainly to be available after missing the Manly game with a shoulder injury.
"We have named Sione on an extended bench but we are not 100 percent sure if he'll be okay or not," he said.
"Herman [Ese'ese] has gone back to reserve grade and played quite well so there are a couple of options we can look at [to replace Guerra]."