Juventus head coach Massimiliano Allegri led calls for the introduction of Video Assistant Referees (VAR)in the Champions League after Cristiano Ronaldo was sent off during the win at Valencia on Wednesday.

Ronaldo was sent off on his first Champions League appearance for the Italian giants as a couple of penalties from Miralem Pjanic gave Allegri's side a 2-0 victory. The Portuguese, the Champions League's all-time leading scorer with 120 goals, was dismissed after just 28 minutes following an off-the-ball incident. He appeared to put his hand on the head of Valencia defender Jeison Murillo, who fell to the ground. Referee Felix Brych gave Ronaldo a straight red card after discussing the incident with his assistant behind the goal.