Red Star Belgrade’s 1991 European Cup glory and breakup by the Yugoslav wars are recalled, followed by a modern resurgence with recent Champions League spots. Ahead of the Europa League at the intimidating Rajko Mitic, Red Star — despite summer sales — rely on goals from Aleksandar Katai, Marko Arnautovic, Mirko Ivanic and Vasilije Kostov, posing a tough away test for Celtic.