Matt Elliott has had his first setback as Warriors coach, with doctors confirming that prop Sione Lousi will be sidelined for six months after rupturing one of his anterior cruciate ligaments.
Lousi picked up the injury to his right knee in Saturday's NRL trial against the Gold Coast Titans at Burleigh Heads.
Twenty-three-year-old Lousi, who was used off the bench in the 24-42 loss to the Titans, had scans on Monday.
Warriors doctor John Mayhew said it was hoped the injury wasn't that bad, but a scan showed that it was more serious.
"We initially thought there was a possibility Sione had damaged his posterior cruciate ligament but unfortunately scans have confirmed he has ruptured his ACL," he said.
"He will have surgery in about two weeks' once the swelling has gone down."
Elliott said everyone at the club felt for Lousi, who isn't expected to play again until August.
"It's devastating for him but he'll have every support we can give him," he said.
"We'll ensure he's kept occupied throughout and have every hope we'll get him back on the field before the end of the season.
"As well as working through the physical side of his rehab, we're going to involve Sione in studies to keep him busy."
Lousi played 22 of the Warriors' 24 games last season, boosting his career tally to 31 since his debut in 2012.
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