Mats Hummels – Borussia Dortmund
The German defender is certainly one of the best centre-backs in world football at the moment. If he came onto the market, several of the world’s leading clubs would be interested in him.
Dortmund were unwilling to let Hummels go during the summer transfer window with both Manchester United and Arsenal interested in signing the centre back. Things might be different in January, especially if Dortmund don’t look like winning any silverware.
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