Michael Ennis could miss Cronulla's semi-final with North Queensland after being put on report for a high tackle.
Ennis was a key figure in the Sharks' 28-12 win over South Sydney on Sunday at Allianz Stadium that ended the Rabbitohs' NRL title defence.
But the clever rake was put on report for a second-half high tackle on Souths back-rower Chris McQueen that could jeopardise his trip to Townsville to play the Cowboys.
Sharks coach Shane Flanagan said he was troubled by the incident.
"It got put on report so that is a worry for me," Flanagan said.