 Complete the following phrase:  They are the only Serbian and ex-Yugoslav club, and only the second team from Eastern Europe, to have won the European Cup, having done so in 1991, which was also the 100th UEFA competing final. Red Star is among the nine clubs, which have ever won the European Cup unbeaten. They are also the only team from the Balkans and Southeast Europe to have won the Intercontinental Cup, also in 