St Johnstone's Michael Duberry may be in disciplinary trouble for criticising referee Mike Tumilty after Saturday's 2-0 loss at Dundee United.
The defender used social networking website Twitter to vent his fury.
On Saturday night, the former Chelsea man launched a scathing attack on Tumilty's handling of the game, peppered with strong language.
The Scottish Football Association say they are aware of Duberry's comments in the public domain.
Saints had defender Steven Anderson sent off for two bookable offences after 15 minutes.
And, in first-half stoppage-time, the visitors conceded a Johnny Russell goal when the United striker appeared to receive the ball in an offside position.
St Johnstone manager Derek McInnes was sent to the stand by Tumilty in the aftermath of Russell's disputed goal.
And the Saints boss was far from impressed by the match officials at Tannadice.
Addressing Tumilty's performance, McInnes told BBC Radio Scotland: "He didn't get the decisions right - the crucial decisions - that changed the game."