The German midfielder was forced off with a hamstring problem just 25 minutes into the 1 - 1 draw at Aix - les - Bains .
The German midfielder was will now undergo a scan to determine the full extent of the injury .
The German midfielder was forced off with a hamstring problem just 25 minutes into the 1 - 1 draw at Aix - les - Bains , and will now undergo a scan to determine the full extent of the injury .