Parramatta beat the Wests Tigers on Sunday but may have lost Tony Williams in the process with the forward suffering a suspected ACL tear.

Williams injured the knee in the first half and didn't return after halftime.

Eels coach Brad Arthur has since confirmed that Williams has likely done his ACL which would be the end of his season.

"I don't think it's real good. He needs to have scans tomorrow but I've been told it's ACL," Arthur said.

Williams had only recently returned to the playing field after doing his ACL last season while playing for Tonga.

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