Arsenal boss Arsene Wenger has joined the battle for Borussia Dortmund defender Mats Hummels. The Mirror says Wenger wants to be kept informed about the availability of Hummels.

The Gunners are ready to challenge Manchester United for the signature of the Germany World Cup winner.

United boss Louis van Gaal has been making all the running for Borussia Dortmund defender Hummels and, despite insistences from his club that he is going nowhere, there is a belief that the player may be available for £30million.

And it is understood that the Londoners will not allow the Old Trafford giants' interest in the 25-year-old to go unchallenged.

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