Out of action
The 18-year-old has torn ligaments in his right ankle and is expected to be unavailable for Schalke's opening two matches in the UEFA Champions League group stage, on 13/14 and 27/28 September.
The German youth international is in his first professional season with Schalke and is yet to appear in the Bundesliga. He joined the Gelsenkirchen team in 1999 and has a contract until the summer of 2007.
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