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The Bundesliga outfit have announced that the Germany international faces a spell on the sidelines, while Marcel Schmelzer will be out of action for a while, too

Borussia Dortmund have been rocked by the news they will have to make do without the services of Mats Hummels for the remainder of the year due to a broken foot.

The centre-back picked up the injury in Germany's 1-0 international friendly win over England on Tuesday and underwent a series of tests on Wednesday to determine the extent of the knock.

Dortmund initially hoped that the injury would not be too serious, but the 24-year-old has now been diagnosed with a fractured metatarsal that will keep him out of action until halfway through January.

Hummels will consequently miss this weekend's Bundesliga match against leaders Bayern Munich as well as the Champions League games at home versus Napoli and away against Olympique de Marseille.

Furthermore, Marcel Schmelzer will be unavailable for three weeks after picking up a calf problem while away on international duty with Germany as well.

The left-back will definitely miss the matches versus Bayern and Napoli, but could be match fit again in time for the clash with Marseille on December 11.

Dortmund were already without the injured Ilkay Gundogan and Neven Subotic for this weekend's match at Signal Iduna Park.