Patrick Vieira believes Cristiano Ronaldo is enduring a "difficult period" at Juventus, and the Turin club need "to understand why he is unhappy."
Ronaldo was substituted for the second consecutive game in Juve's 1-0 win over AC Milan on Sunday, and his replacement, Paulo Dybala, went on to score the winner to put Juve back at the head of Serie A:
OptaPaolo1 - Cristiano Ronaldo has been subbed off during the first 55' minutes of play for his first time for Juventus and also has been subbed off for two consecutive games for his first time with the Bianconeri.