Panther Viliame Kikau has been found guilty by the NRL judiciary on Tuesday night.
Kikau was charged for a lifting tackle on Roosters prop Jared Waerea-Hargreaves in last Friday night's clash, resulting in a one-match ban.
He will miss next week's preliminary final clash against Parramatta or South Sydney as a result.
"While I'm obviously disappointed with the outcome, I respect the decision of the NRL Judiciary," Kikau said in a club statement.
"I'll now focus on doing everything I can at training to help the team prepare for the Preliminary Final."