Radivoje Kalajdzic has three losses against three opponents on his boxing record. For a list of Kalajdzic's best fights, refer to "Best fights of Radivoje Kalajdzic".
On August 3, 2024 Radivoje Kalajdzic fought David Morrell Jr. in a light-heavyweight world-title fight for the WBA title. Kalajdzic was 33 years old and with a record of 29-3 (22), and Morrell Jr. was 26 years old and with a record of 10-0 (9). Kalajdzic lost the fight via 12-round unanimous decision.
On May 4, 2019 Radivoje Kalajdzic fought Artur Beterbiev in a light-heavyweight world-title fight for Beterbiev's IBF title. Kalajdzic was 27 years old and with a record of 24-2 (18), and Beterbiev was 34 years old and with a record of 13-0 (13). Kalajdzic lost the fight via 5th-round KO.
On April 16, 2016 Radivoje Kalajdzic faced off against Marcus Browne in a light-heavyweight bout at age 24. He was coming in with a record of 21-1 (15), and Browne was 25 years old and with a record of 17-0 (13). Kalajdzic lost the fight via 8-round split decision.