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Dortmund's "Borussia" club is still plagued by injuries.
One of the team's leaders, center-back Mats Hummels, broke his foot and in 2013 we won't see him on the field.
The footballer suffered the injury representing the German national team in a friendly match against England, which Joachim Low's players won by a minimal score.
The 24-year-old defender hoped that the injury would not be so serious, but he was diagnosed with a broken foot.
Jurgen Klopp's players will have to manage for three weeks without Hummels and defender Marcel Schmelzer, who sustained a thigh injury while in the German national team camp.
These footballers will certainly miss a crucial match in the Bundesliga against Bayern Munich.
Another key defender - Neven Subotic, also recently suffered a long-term injury. The team also has to cope without the services of Ilkay Gundogan.
