[1] As 15-years-old, Radovanović played for Budućnost Bijeljina in the R Srpska First League during the 2018–19 season, averaging 18 points per game.
[2] In January 2019, Radovanović moved to Belgrade, Serbia joining the youth system of Partizan NIS.
On 27 February, he made his professional debut in a 96–94 loss to Zadar, recording 3 points and two rebounds in 12 minutes of playing time.
[10][11] On 10 March, Radovanović appeared for 12 seconds in a 75–70 loss to Metropolitans 92, making his EuroCup debut without a record.
[15] Radovanović was a member of the Serbian under-16 national team that participated at the 2019 FIBA U16 European Championship in Udine, Italy.