Celtic striker Leigh Griffiths has been issued with a notice of complaint after he was filmed mocking Hearts before their derby win over former club Hibernian.
The ex-Easter Road front man was recorded on a mobile phone singing "Hearts are going bust" in a capital pub in the hours before the Tynecastle clash on Sunday.
The footage of the 23-year-old, who sealed a £1million switch from Wolves to Parkhead in January, was posted on YouTube where it spread like wildfire.
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Now the Scottish Football Association's compliance officer Vincent Lunny says the Scotland cap has a case to answer.
He has been accused of breaching Disciplinary Rule 86 - which demands players, staff or officials act in the best interests of the game - by singing in public about Heart of Midlothian FC in administration.
A principal hearing has been set for Thursday, April 24.
Hearts boss Gary Locke was questioned about the video on Tuesday morning and said: "I haven't seen it. Obviously you read about it and according to reports I've heard he is not a very good singer."