UEFA has confirmed disciplinary proceedings have been opened against Cristiano Ronaldo following his red card in Juventus' Champions League victory in Valencia on Wednesday.

The 33-year-old was visibly distraught leaving the field after German referee Felix Brych, on the advice of his assistant, Marco Fritz, sent him off for an off-the-ball incident with Jeison Murillo, in which the Portuguese appeared to pull the Valencia defender's hair.

The straight red card means Ronaldo will be definitely be suspended for Juventus' next Group H game, against Young Boys at the Allianz Stadium on 2 October.

UEFA's ruling on 27 September will determine whether the striker receives a two-game ban, which would rule him out of the upcoming trip to Old Trafford to face former club Manchester United on 23 October.

Due to the amount of time it took him to leave the field, the disciplinary proceedings could even see his ban increased to three games, denying him the chance to play against the Premier League side in Turin as well.

According to UEFA's regulations, "a player who is sent off the field of play is suspended for the next match in a UEFA club competition (i.e. UEFA Champions League, UEFA Europa League or UEFA Super Cup). In case of serious offences, the UEFA Control, Ethics and Disciplinary Body is entitled to augment this punishment, including by extending it to other competitions."