Guardiola described Mourinho as the f***ing boss in his pre-match press conference in 2011

Pep Guardiola and Mourinho's Press battle in pre-match press conference in 2011 between Real Madrid and Barcelona.

Mourinho was first to talk in the Press Conference.

Mourinho said. 'There was a very small group of coaches who didn't talk about referees and larger group who did. Now, with Pep's comments, we have started a new era with a third group, featuring only one person, a man who criticises them when he makes good decisions. This is completely new to me.'

The Barcelona players were watching Mourinho's press conference in their Madrid team hotel. The television had been turned up. And their manager had been pushed over the edge.

Pep Guardiola didn't like the first-name terms familiarity of Mourinho's latest dig and he didn't like the suggestion that Barcelona were either constantly whining about referees, or winning because of them.

Guardiola replied Mourinho saying:  'As senor Mourinho has called me Pep, I'm going to call him Jose. Tomorrow at 8.45pm we will face each other on the pitch. Off the pitch he's won. He's been winning off the pitch all season. Let them give him a Champions League for it so he can enjoy it and take it home. In the press room he is 'el puto jefe' (the f***ing boss) and the one who knows more than everyone else.'

Guardiola went for Mourinho in a 45-minute press conference rant in which he had even asked 'which camera is Senor Jose's?' so he could look his rival in the eye.

When he got back to his players at the team hotel they gave him a standing ovation. And the following day they responded by beating Real Madrid 2-0 at the Santiago Bernabeu.

If there was a Champions League for talking then Jose Mourinho would win it every season. 

That was what Pep Guardiola was implying when, after almost an entire season of turning the other cheek, he finally gave in to provocation in a press conference diatribe directed at his rival in which he famously referred to him as 'el puto jefe' (the f***ing boss).

It came ahead of the first leg of Real Madrid and Barcelona's Champions League semi-final in 2011 that Mourinho poked Pep's cage just one too many times, sarcastically suggesting that he was breaking new ground by criticising referees even when they were right.