Injured Grosskreutz ruled out for six weeks

The versatile Germany international was withdrawn in the 60th minute of the clash at Signal Iduna Park, which saw the visitors hold on to claim all three points through Raul Bobadilla's goal despite Christoph Janker's red card.

And that loss has proven doubly costly with Grosskreutz, who can operate on the wing as well as in central midfield and at full-back, reduced to the role of spectator until March.

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