Watch: Man Utd legend Keane appalled at ’embarrassing’ Son Heung-min dive
The United players were left fuming after Cavani’s goal was disallowed as replays showed that McTominay had accidentally swiped at Son’s face while the two were challenging for the ball.
Speaking on Sky Sports at half-time, Keane didn’t mince his words when asked about the decision.
He said: “I’m amazed really. I have to say if this is a foul then we should all go home.
“It’s really bizarre for a player like Son to roll around like that – it’s embarrassing. Obviously, it’s great movement there from Cavani but that can’t be a foul. How a player can stay down there.
“It’s not just Son – Rashford did it ten minutes earlier. Both sets of players were rolling around screaming. The ref is under huge pressure and he’s doubting every decision he makes now but clearly, he’s got this wrong.”