St Johnstone defender Michael Duberry could face disciplinary action from the Scottish Football Association after criticising a referee following Saturday's defeat to Dundee United.
The Saints went down 2-0 in the Tayside derby at United and Duberry vented his anger on social networking website Twitter after the final whistle.
St Johnstone had defender Steven Anderson sent off by referee Mike Tumilty for two yellow cards after 15 minutes and conceded a Johnny Russell goal when the United striker appeared to receive the ball in an offside position.
Former Chelsea and Leeds defender Duberry wrote: "I hate refs.
"I have never seen such a blatant offside. I hope the officials that did our game are embarrassed by there performance today. Rubbish.
"Fined? For what saying I hate refs? Or saying they should be embarrassed by their performance? Don't think its a fineable offence! Hope not."
The SFA could punish Duberry for making public comments criticising officials.
A spokesperson said: "We are aware of the comments."