Chelsea owner Roman Abramovich, who is furious over his team's loss to Inter Milan, turned up unannounced at the club's training ground, asking every single player and member of the coaching and medical staff to perform or perish.

Abramovich's unannounced trip to the training ground showed that side of the owner, which very few at Chelsea had ever witnessed

The Russian billionaire Abramovich's mood had darkened after the Inter humiliation when 3,000 Italian fans, held back by police and stewards, taunted the Russian, News of the World reports.

On the day Jose Mourinho was sacked, he stood in the Bridge's reception and told Peter Kenyon: "I have never lost here and one day I will be back to haunt you and I will win again." The message was duly passed on to Abramovich who treated it with disdain, the report said.

In the meeting, Abramovich did not say much, but made it clear the standards that had slipped so dramatically off the pitch were now being mirrored on it and he would tolerate it no longer, it added.

One person who was in the meeting admitted nobody had ever seen Abramovich so obviously angry and disgusted.

He said: "Roman didn't actually say that much but it was clear from what he did say and his body language that he was absolutely furious. Nobody knew he was coming to Cobham on Wednesday and certainly nobody expected the three most powerful men at the club to call a meeting.

"The meeting lasted almost two hours and it wasn't a debate, it was the boss getting a message across and everybody was pretty clear about what it meant. If there wasn't a dramatic change, then there would be new faces coming in the summer."

Abramovich has repaired his relationship with the former Blues boss, but doesn't like to be reminded of the one major error he's made since his arrival in English football. (ANI)