Which Serbian football club is the only one from that country to win an UEFA completion?
Red Star Belgrade F.C Red Star Belgrade F.C. Crvena Zvezda FK F.K. Crvena Zvezda FK Estrella Roja FK Crvena zvezda Crevna zvezda F.C. Red star Belgrade Red Star Belgrade FC Crvena zvezda FK F.K. Crvena zvezda FK crvena zvezda FK Crvena Zvezda Beograd Red Star Belgrade Red Star Beograd Fk crvena zvezda Crvena zvezda Beograd F.K. Crvena zvezda Beograd Red star Belgrade FC Crvena Zvezda F.K. Red Star of Belgrade Red star Belgrade FC Crevna Zvezda FC Red Star Belgrade Red star Belgrade F.C. Crvena Zvezda Beograd Zvezdina zvezda F.C Red Star Belgrade FK Crvena Zvezda Crvena zvezda F.K. FK Crvena zvezda Beograd RED STAR BELGRADE FC Red star Belgrade FK Red Star F.K. Crvena Zvezda Beograd F.C. Red Star Belgrade