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Aleksandar "Aca" Nikolić (Serbian Cyrillic: Александар "Аца" Николић; 28 October 1924 – 12 March 2000) was a Serbian professional basketball player and coach. He was also a professor at the University of Belgrade's Faculty of Sport and Physical Education. He is often referred to as the Father of Yugoslav and Serbian Basketball.Nikolić acted as a mentor to many young basketball coaches in Yugoslavia, some of whom—such as Božidar Maljković, Dušan Ivković, Bogdan Tanjević, and Željko Obradović—would go on to great professional success in their own right. Nicknamed the Professor and Iron Sergeant, Nikolić was inducted into the Basketball Hall of Fame as a coach in 1998, and into the FIBA Hall of Fame in 2007. In 2008, he was named one of the 50 Greatest EuroLeague Contributors.