Fudbalski klub Željezničar Sarajevo (; English: Football Club Željezničar Sarajevo), commonly referred to as Željo, is a professional football club, based in Sarajevo, Bosnia and Herzegovina. The name Željezničar means "railway worker", originating from their establishment by a group of railway workers in 1921. Throughout its history, the club has cultivated a reputation for producing talented home-grown players through its academy. During the days of socialist Yugoslavia, FK Željezničar were national champions in the 1971–72 season, qualifying for the European Cup during the 1972–73 season. The club has also finished as runners-up once in the league, and contested 1980–81 Yugoslav Cup final. In Europe, the club reached UEFA Cup semi-finals during the 1984–85 season and the quarter-finals during the 1971–72 season. Željezničar is the most successful football team in present-day Bosnia, having won 6 Bosnian championships, 6 Bosnian Cups and 3 Bosnian Supercups. The club's so far best post-war European result was qualifying to the 2002–03 Champions League third qualifying round, losing to Newcastle United. Their biggest rival is FK Sarajevo with whom they contest the biggest football match in Bosnia and Herzegovina, the Sarajevo derby. History Pre-independence (1921–1992) Željezničar was formed by a group of railway workers. During the early 20th century, there were several football clubs in Sarajevo. They were rich and usually backed by various organizations, most of them on an ethnic basis: Bosniaks, Serbs, Bosnian Croats, Bosnian Jews, unlike Željezničar. Since it was a financially poor club, they used to organize dance nights and all the profits made were later used to buy shoes and balls. Financial problems were not the only ones. The club's embrace of members of all ethnic backgrounds was seen as a threat by many at the time, so Željezničar was suppressed in various ways. Despite that, the club managed to survive, and even beat wealthier clubs. The first official match, a friendly, was played at Kovačići, a Sarajevo settlement, on 17 September 1921 against SAŠK Napredak which resulted in 1–5 defeat. The next day another game was played, a 1–2 loss vs Sarajevski ŠK. In 1941, World War II came to Sarajevo, and all football activity was stopped. Many footballers were members of the resistance troops, and some of them were killed. After the war, Željo was reborn, and in 1946, it won the Bosnian Republic championship which was one of the 7 regional leagues formed in order to provide participants