 Born in Podgorica, Ćetković began playing in a minor Montenegrin club, FK Crvena Stijena, from where he moved to FK Budućnost Podgorica.His good performance brought him offers from clubs, but he decided to stay in the domestic league, this time in Serbia for Belgrade's clubs FK Čukarički and FK Železnik (now FK Voždovac).In January 2006, he moved to German club F.C.