The Warriors have confirmed captain Roger Tuivasa-Sheck will undergo surgery on his knee after his disappointing early departure from the NRL playoffs.
Tuivasa-Sheck will have surgery on Friday on his left knee after scans revealed a medial ligament and meniscal injury he picked up during the Warriors' 27-12 loss to the Panthers on Saturday.
"His expected recovery time is yet to be determined," the club said.
Tuivasa-Sheck had to be assisted from the field midway through the first half of their elimination final defeat to Penrith after his knee collided with Panthers rake Sione Katoa.
It was a disappointing end to the NRL campaign for Tuivasa-Sheck, who is considered one of the front-runners for the prestigious Dally M medal as player of the year.
The Kiwis will keep a close eye on the fullback with a Test against Australia in Auckland occurring in just over a month's time in Auckland on October 13.
New Zealand then play four Tests in a tour of Europe.
The 25-year-old missed the Kiwis' controversial mid-season Test against England, with Panthers fullback Dallin Watene-Zelezniak wearing the No.1 jumper.