Tuivasa-Sheck pulled up sore from a tackle on Hayden Buchanan against last-placed St George Illawarra on Saturday night.
The veteran outside back left the field 11 minutes into his first game back from a minor shoulder injury.
Tuivasa-Sheck was seen in a knee brace after the Warriors' 30-12 win, but said he felt optimistic about his chances of facing ladder-leading Penrith in next Sunday's blockbuster.
He was able to walk independently to the Warriors' team bus at Jubilee Stadium, but this would not necessarily preclude a serious knee injury.
Warriors teammate Tanah Boyd was similarly mobile after suffering a season-ending anterior cruciate ligament rupture in round 11.
An ACL injury would mean 32-year-old Tuivasa-Sheck has likely played his last NRL game - the only man to win the Dally M Medal playing for the Warriors will leave at season's end for English side Wakefield Trinity.
Immediately after full-time, Warriors coach Andrew Webster said he did not yet know if the injury was an ACL rupture.
"It's just funny with those injuries, I wish we had a scan machine at every ground and then we could walk in here and give you guys feedback straight away, and we'd have clarity," he said.
"But until we get that, we'll just wait and see."
Adam Pompey looms as Tuivasa-Sheck's likeliest replacement for the clash against the Panthers if he needs to miss time.
Webster had mixed feedback for the Warriors after Saturday's game, which featured try-scoring doubles for Te Maire Martin, Dallin Watene-Zelezniak and Alofiana Khan-Pereira, but 15 errors from the visitors.
"Some of our best stuff, and some of our not-so-good stuff," Webster said.
"There were big momentum swings tonight from us, but I thought we were really brave on our tryline for long periods.Â
"I thought we were really dominant when we hung on to the ball for long enough, the way we carried, and I think we created opportunities on their tryline that were just off momentum."
16°C