Siosiua Taukeiaho was a late withdrawal from the Sydney Roosters Round 6 match against the South Sydney Rabbitohs after sustaining an injury to his left knee during a contact drill in the pre-game warm-up.
Taukeiaho received scans on Thursday night, but the results were inconclusive.
He will be further evaluated on Monday morning to determine the extent of the injury.
The squad that took to the field against the Rabbitohs made it through the match without injury concern.