Mats Hummels insists he's committed to Borussia Dortmund.

The Daily Mail says Manchester United, Real Madrid and Bayern Munich are also keeping tabs on the £30m-rated German international defender.

The 23-year-old gave short shrift to reporters who told him about the clubs currently chasing his signature.

"But I want to stay here, why should I go? I feel good here and I am very grateful to the club that I got the chance," said Hummels.