UEFA has confirmed disciplinary proceedings have been opened against Cristiano Ronaldo following his red card in Juventus' Champions League victory over Valencia on Wednesday.
The Juve superstar was controversially dismissed just 29 minutes into his first European outing for the Serie A champions after tangling with Jeison Murillo.
Ronaldo was shown a straight red card after appearing to raise his hand to Murillo, the defender tumbling to the ground and reacting to the Portugal international pulling at his hair.
Having consulted with his assistants, referee Felix Brych sent Ronaldo off and the forward left the Mestalla pitch in tears.
The red card incurs a one-game suspension for the 33-year-old and he could face further punishment, potentially missing a return to Manchester United when Juve visit Old Trafford for their third Group H game on October 23.
Ronaldo's case will be heard by UEFA's Control, Ethics and Disciplinary Body on September 27.
The Champions League's record goalscorer received support from his Juve team-mates following the incident, with midfielder Miralem Pjanic calling the decision "absurd".
Coach Massimiliano Allegri suggested VAR would have exonerated Ronaldo, while Emre Can insisted it was "100 per cent not a red card".