Sunderland v Arsenal - Premier League match preview
Manchester United and Arsenal are also said to be interested again, with United having tried to buy him in 2014.
While the Gunners could look to Hummels to replace veteran defender Per Mertesacker.
The centre-back would be the third Dortmund player to make a shock move to the Allianz Area following the recent signings of Mario Gotze and Robert Lewandowski.
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