Mats Hummels has denied reports that he's already agreed upon a deal to join Manchester United.

Hummels has been a target for several top European clubs and he's recently said he has interest in playing abroad.

Hummels' current deal with Borussia Dortmund expires in 2017.

“Just to be clear. This alleged ‘promise’ is simply an invention … and that is saying it nicely,” wrote Hummels on Twitter.