Arsenal boss Arsene Wenger admits he's no friend of Chelsea counterpart Jose Mourinho.
Saturday's match at Chelsea is Wenger's 1,000th game as manager of Arsenal and a crucial fixture in the race for the Barclays Premier League title.
Wenger said: "You cannot be friends. It is impossible. If I start any game, I have to win. That is our job.
"The real sport on that front is rugby. They do not kiss each other before the game when they walk in the tunnel. They go out and are ready for war."
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