Cristiano Ronaldo has emerged as a fitness doubt for Manchester United's Premier League match against West Ham on Saturday.
The Portuguese forward suffered a neck injury during the 3-1 win at Brentford on Wednesday night, when he was taken off and threw a tantrum at interim manager Ralf Rangnick.
Ronaldo sat on the steps in the away dug-out at the Brentford Community Stadium and was caught by the television cameras asking Rangnick for an explanation as to why he was subbed for Harry Maguire.
The German coach explained afterwards that he wanted to reduce the risk of United throwing away a two-goal lead late on as they did at Aston Villa last weekend.