The 1990–91 FIBA Korać Cup was the 20th edition of FIBA's Korać Cup basketball competition. The Italian Shampoo Clear Cantu defeated the Spanish Real Madrid Otaysa in the final. This was Shampoo Clear Cantu's fourth time winning the title.
Round of 16
Group BGroup D ==Quarterfinals==
Finals
• After extra-time. Originally Real beat with 77–79 ==Rosters==