Back in 2005, Roy Keane and Patrick Vieira clashed in the tunnel ahead of a Premier League game between Arsenal and Manchester United.
Talking about the incident Keane said in his autobiography: "If it had come to a fight, Patrick could probably have killed me.
“As I walked to the front I heard something going on at the top of the tunnel," he writes.
"All I could see was a few fingers, pointing at Gary. I lost it. Five seconds earlier I'd been perfectly calm, in the zone, ready for the match.
“I'd thought they might have booted him out on the pitch. But in the tunnel? I just thought 'The f******'.
"They were trying to bully him. They were a big team and, in the tunnel, they were even bigger. So I said to myself 'Alright, let's go'.
Manchester United eventually won the game 4-2, but neither Vieira nor Keane were punished for almost coming to blow in the tunnel.
