Cristiano Ronaldo was not the problem at Manchester United last season but has become a problem since pre-season.
Ronaldo has always come with more baggage than a Kardashian and his sullen departure down the tunnel before full-time on Wednesday night was typical of a man with an ego the size of a planet.
He has form for dugout drama. In December 2008, Ronaldo grimaced and self-substituted himself with United goalless against Sunderland. The following evening, he was painless and smiling in Paris as he clutched the Ballon d'Or.
