Ronaldo will find out whether he will miss further games next Thursday when UEFA meet to discuss the incident.
The 33-year-old was perhaps unfortunate that German referee Felix Brych opted for a red, rather than a yellow, card but there was still risk in engaging with Murillo.
"I can only say that VAR would have helped the referee make the right decision", Allegri said after the game.
It was feared that Ronaldo could be banned for more than one match if the incident was deemed to be violent conduct.
The following game for Juventus is on October 23rd at Old Trafford, where Ronaldo played for six years.
Despite Ronaldo's dismissal, Juventus recorded an impressive 2-0 win at the Mestalla Stadium, with Miralem Pjanic scoring twice from the penalty spot.
The five-time Champions League victor has been the top-scorer in the Champions League the past six seasons.
"It is very disappointing, we nearly lost because of that and we will be without Ronaldo for the next (game)". Asked about Cristiano Ronaldo's summer exit from Real, he said, "It would have been a pleasure to play with him", adding: "I want to follow in his footsteps".
Manchester United legend Kevin Moran is not confident about seeing Cristiano Ronaldo playing at Old Trafford for Juventus next month.
"And if that's the case, unfortunately, we won't see Ronaldo at Old Trafford".