Hibernian have lost their appeal against the red card shown to Kevin Thomson during Saturday's 1-1 draw with Dundee United.
reacted angrily to a tackle from Gavin Gunning
during the match at Easter Road, with both men sent off after a scuffle.
The Scottish FA's disciplinary panel has upheld the dismissal and applied an immediate two-match suspension.
United decided against challenging Gunning's red card.
Thomson appeared to be caught by Gunning's follow-through as they challenged for a bouncing ball on the edge of the United penalty box.
Both men went head-to-head as a scrum of team-mates raced in to pull them apart.
And a Hibernian spokesman said the club were "extremely disappointed" with the unsuccessful appeal.