Tottenham's sporting director Damien Comolli has revealed that Arsenal manager Arsene Wenger cannot handle watching his side lose.
Spurs clash with the Gunners at White Hart Lane on Saturday and defeat for the visitors would leave their boss in a rage.
Comolli was with Wenger at Monaco, Japan's Grampus Eight and was European scout for Arsenal before joining Tottenham.
And he has revealed in a new book called 'Arsene Wenger, The Biography', written by Xavier Rivoire and published by Aurum that his old boss is a bad loser.
"I saw Arsene after defeat at Arsenal and he didn't talk, he didn't eat," says Comolli.
"Normally - that is to say, when he hadn't lost - he was a nice guy, with a lot of class and restraint. But people knew there was this cauldron inside of him.
"Arsene in a rage is nothing like the image the people have of him. It is precisely the opposite because he is perceived as detached and lacking passion.
"In fact, he always gives 200 per cent and, yes, he can explode.
"I have seen him in some incredible states. But the amazing thing is that the morning after a defeat, although he feels exactly the same inside, he never shows it to his players."
He has or ought to feel sad or mad if arsenal lose. We are a big team and our aim is to win,not like a cunty club like spud.