Holtby began his professional career with Alemannia Aachen before signing for Schalke 04 two years later .
Lewis Harry Holtby ( born 18 September 1990 ) is a German professional footballer who plays as a midfielder for Bundesliga club Hamburger SV .
footballer began Lewis Harry Holtby 's professional career with Alemannia Aachen before signing for Schalke 04 two years later .
Lewis Harry Holtby ( born 18 September 1990 ) is a German professional footballer who plays as a midfielder for Bundesliga club Hamburger SV .