Dejan Savicevic claims members of Red Star Belgrade's 1991 European Cup-winning side were offered bribes to lose the final against Olympique de Marseille.
The Serbian club went on to triumph 5-3 on penalties in Bari 22 years ago, but, according to Savicevic, several players had been approached by unnamed figures in their hotel rooms on the eve of the clash.
"It's not a secret," Savicevic said in an interview with the Associated Press. "I have been saying this for a while and I have never denied it: 500,000 marks was offered to us.
"We refused it because it is not in our character. Everyone knows it ... ask [goalkeeper Stevan] Stojanovic, or [midfielder] Robert Prosinecki."
The former midfielder, who is now head of Montenegro's football association, went on to lift the Champions League trophy for a second time with AC Milan in 1994.
Marseille, meanwhile, won the Champions League in its inaugural season in 1992-93, but had its Ligue 1 title stripped amid a match-fixing scandal.