Leinster prop Cian Healy was suspended for two weeks at a disciplinary hearing in London on Thursday.
The Ireland forward was cited for allegedly striking Toulon hooker Guilhem Guirado during the 24-9 European Rugby Champions Cup defeat at Stade Felix Mayol on December 13.
Healy was initially charged for striking with the knee, but that was downgraded to one of "dangerous charging or obstructing or grabbing of an opponent without the ball, including shouldering".
The 28-year-old successfully appealed the amended charge and was cleared to play in the Pro12 win at Munster last Sunday, but has now been banned until Monday January 11.
Healy was deemed to have committed a reckless act of foul play, but a three-week suspension was reduced to two due to his "good character and good conduct during the hearing".
He has the right to appeal against the decision, but will otherwise miss the Pro12 encounter with Connact on New Year's Day and Ospreys a week later.