[3] He previously played for GAIS, Rangers, Pescara, Gençlerbirliği, Akhisar Belediyespor, Häcken, and Fatih Karagümrük.

[4] Çelik made his competitive début against GIF Sundsvall in the Allsvenskan on 20 July 2008,[2][4] and appeared in the starting eleven for the first time six weeks later against IFK Göteborg.

However, there were suggestions that Celik was not offered a new contract within 60 days before the end of his previous deal, meaning that no compensation would have been necessary.

Both GAIS and Celik disputed this and the club have threatened to take the matter to FIFA if Rangers don't pay them.

[4] BK Häcken Çelik was born and raised in the suburb Biskopsgården, Hisingen, an island which forms part of the Gothenburg Municipality.