Warriors captain Roger Tuivasa-Sheck will have surgery on his injured left knee on Friday.
The 25-year-old fullback was carried off 27 minutes into Saturday's season ending NRL elimination finals defeat to Penrith at ANZ Stadium.
The Warriors had led 12-2 early on but never recovered once Tuivasa-Sheck departed as Penrith piled on 25 unanswered points to advance to Friday's semi-final against Cronulla at Allianz Stadium.
Scans earlier this week revealed he had suffered a medial ligament and meniscal injury with his recovery time yet to be determined.
It was a disappointing finish to the season for the New Zealand international who remains in doubt for the Kiwis upcoming test against Australia and end of year tour of the UK.