Don't expect friendly banter and high fives when Roy Keane and Alan Shearer appear alongside each other on the BBC's coverage of Manchester United versus Arsenal at Old Trafford tonight.
A place in the semi-finals of the FA Cup is at stake tonight but a potential clash between the Corkman and Shearer is almost as box office as the game.
There was never any love lost between the pair on the field.
When asked whether it would be awkward to bump into Shearer given their past, Keane told ShortList magazine last November: "No, because I was in the back of his mind, too.
"Same with Patrick [Vieira]. This wasn't chess we were playing, it was high-level football.
"People always talk about the tackles I did – what about the tackles that were put on me?.2
Here is a time when the pair clashed on the pitch in the 2001/02 season.