He was subsequently loaned to VfL Bochum and Mainz 05 before returning to Gelsenkirchen where he lifted the DFL - Supercup in 2011 .
Holtby began his professional career with Alemannia Aachen before signing for Schalke 04 two years later .
Holtby was subsequently loaned to VfL Bochum and Mainz 05 before returning to Gelsenkirchen where Holtby lifted the DFL - Supercup in 2011 .
Holtby began his professional career with Alemannia Aachen before signing for Schalke 04 two years later .