Ronaldo will find out whether he will miss further games next Thursday when UEFA meet to discuss the incident.
He will find out next week whether his one-match ban is extended.
Jose Mourinho's men were inspired by Paul Pogba on the artificial pitch, as the French World Cup victor drilled home a brilliant opener before converting a penalty on the stroke of half-time, and setting up Anthony Martial for the third.
The 24-year-old was speaking to DAZN sports and was quoted as saying "I just found out it (the red card) was because he pulled Murillo's hair".
A one-match ban is guaranteed, meaning he will sit out Juve's game at home to Young Boys on October 2. Juventus would also be allowed to appeal.
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And that was a viewpoint endorsed by former Premier League referee Mark Clattenburg, who believes the assistant referee stationed behind the goal got the decision wrong.
Cristiano Ronaldo has endured a shaky start to life at Juventus, but coach Massimiliano Allegri claims the five-time Ballon d'Or victor has nothing to prove.
"I can only say that VAR would've helped the referee in this decision", Allegri said. There is a possibility that UEFA could hand down a harsher punishment to the player, although it is unlikely they will do so.
"It is very disappointing, we nearly lost because of that and we will be without Ronaldo for the next (game)".
"And if that's the case, unfortunately, we won't see Ronaldo at Old Trafford".