Roy Keane and Jamie Carragher exploded into a screaming match as they debated Cristiano Ronaldo's role after the Manchester United star was left on the bench against Chelsea.
United made the surprise decision to leave their world superstar player on the bench as they held Chelsea to a 1-1 draw at Stamford Bridge.
Ronaldo came on as a 64th minute substitution, but showed frustration after talking his way into the referee's book for a yellow card and heading straight down the tunnel as soon as the final whistle went.
Cristiano Ronaldo was left on the bench for Manchester United's clash with Chelsea
Ronaldo showed visible signs of frustration when he came on and quickly left down the tunnel after the final whistle
Following the match, Roy Keane questioned why Ronaldo was left on the bench, though fellow pundit Jamie Carragher said it shouldn't be a 'big story'.
Carragher said on Sky Sports after the game: 'Ronaldo's not the player he was, he still obviously delivering in terms of goals. But it shouldn't be this big story Cristiano Ronaldo doesn't start every game or at times comes off.
In response, Keane said: 'Not every game Jamie but this is Chelsea, this is a big game for Manchester United. I forgive in Champions League group games when you think you're gonna get through I get that.
'But Ronaldo, if you bumped into him in the car park. You see a guy who's won everything in the game, he's come back to lift the club of course he wants to play in these games.'
Roy Keane questioned why Ronaldo had been left on the bench in a game as big as Chelsea
It was at this point both pundits started talking over each other as Carragher said 'that's the case for every player'.
Keane responded: 'They're not all world class, he's played 800 games in his career. If you're watching Manchester United today and they're poor you're still thinking if the ball falls to anybody in world football, even at 36 it's Ronaldo.
'It's not like he's come back to the club and he's not back to speed and looks off, he looks on it, he looks interested. This idea that he's been blamed for the high pressing.
'He's not pressed for four to six years. Ronaldo's not going to fix United's problems but you don't bring Ronaldo back to Man United to sit on the bench. Of course he's not going to start every game but this is Chelsea away where you might get a counter attack where you might get one or two balls into the box.'
Carragher then added: 'Why did Man United sign Cristiano Ronaldo? They signed him to stop him going to Man City. There was no plan to sign Cristiano Ronaldo.'
Keane hit back: 'He was always going to play, he wasn't coming back to Man United to stop him going to Man City but sit on the bench.
Carragher said that Ronaldo's omission from the team at 36 shouldn't be 'big news'
'I didn't say that, Carragher responded. 'I'm saying is a Manchester United
