In 2008, Şahan played his first professional match against Alemannia Aachen with MSV Duisburg shirt.

With his new team he started to play at Bundesliga level and inspired Fritz-Walter-Stadion guests very quickly in a short time.

His performances during the 2012–13 season earned him a call-up to the Turkey national team managed by Abdullah Avcı.

Manager Fatih Terim selected Şahan for Turkey 2014 World Cup UEFA Group D qualifying matches.

[2] Şahan plays as an attacking midfielder, generally as a left winger in Turkish Super League.