Wayne Rooney has called out fellow Manchester United legend Roy Keane for defending superstar forward Cristiano Ronaldo.
The 37-year-old has endured a difficult campaign to date for United with a lack of starts under new boss Erik ten Hag with things coming to a boiling point last month when he stormed off down the tunnel early against Tottenham.
It was one of a number of incidents that has shown tension between Ronaldo and ten Hag - creating speculation over Ronaldo's future at Old Trafford once again.
Former Red Devils captain Keane was among the few defending the former Real Madrid forward, insisting it's frustration.
Rooney, however, has hit back at the Irishman with claims that he wouldn't have stood for such behaviour when he was captain at United.
'No, I don't think so,' Rooney told TalkSport. 'Him and Messi are arguably the two best players of all-time and you can go either way with that, whatever way you decide.
'But I just think the things he has done from the start of the season, it is not acceptable for Manchester United.
'I've seen Roy Keane defending him. Roy wouldn't accept that. Roy wouldn't accept that at all.
'It is a distraction which Manchester United don't need at the minute, trying to rebuild.'
The DC United manager has also insisted that Ronaldo could still be an asset for United if he knuckles down and understands his role under the Dutchman this campaign.
'For Cristiano, just get your head down and work and be ready to play when the manager needs you.
'If he does that, he will be an asset. If he doesn't, it will become an unwanted distraction.'
After being banished from the first-team after the Tottenham incident and being forced to miss the Chelsea clash, Ronaldo has worked his way back into the picture at United.
The Portugal international returned in the Europa League and then even wore the captain's armband as they suffered a disappointing 3-1 defeat to Aston Villa in the Premier League last weekend.
He wasn't part of the matchday squad during the club's 4-2 victory over Villa in the Carabao Cup on Thursday.