The 2021 Triglav osiguranje Radivoj Korać Cup was the 19th season of the Serbian men's national basketball cup tournament. The tournament was held in Novi Sad between 11–14 February 2021. All games will be played behind closed doors due to the COVID-19 pandemic in Serbia. Partizan NIS was the three-time defending champion. Radnički Kragujevac, Mladost Zemun, and Vojvodina made their debuts at the national cup tournament. Crvena zvezda mts won its 7th Serbian Cup title following a 73–60 win over Mega Soccerbet.