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.

The Radivoj Korać Cup is the men's national basketball cup of Serbia. It is run by the Basketball Federation of Serbia and is named after a Serbian basketball legend and FIBA Hall of Fame and Basketball Hall of Fame member Radivoj Korać.