From Wikipedia:

Jörg Zufall (born 1963) is a German actor. From May 1998 to July 1999, he played music and sports teacher Sven Weber in the German children's and youth series Schloss Einstein, his best-known role to date. Zufall has also appeared in various other German television productions, such as Polizeiruf 110, Sunny Point, and Unser Charly.