Thomas Muller could be suspended for Bayern Munich's two Champions League last-16 matches following his kick to Nicolas Tagliafico's head in Wednesday's 3-3 draw with Ajax.
Germany international Muller was shown a straight red card in the 75th minute when, attempting to control a high cross-field pass, his studs made contact with Tagliafico, leaving a cut on the defender.
The 29-year-old may be dealt more than the mandatory one-match ban if UEFA deems the incident a serious offence at a hearing on January 10.
Ajax centre-back Maximilian Wober also faces an anxious wait after he was dismissed for a rash challenge on Leon Goretzka eight minutes earlier.
The entertaining draw in Amsterdam was enough for Bayern to advance as Group D winner, two points clear of the Eredivisie outfit.
Both clubs, along with Barcelona and Shakhtar Donetsk, will be subject to UEFA disciplinary proceedings and potential fines for a range of off-field indiscretions.
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