He is on the books of FK Kozara Gradiska and wears shirt number 9. At international level, he features for Bosnia U17. His main role on the pitch is Forward. His stronger foot is Right. His estimated market valuation currently stands at 50K €.

His latest transfer saw him join FK Kozara Gradiska from FK Sarajevo B via on 2026-01-16.

During the UEFA Youth League 2024-2025 campaign, Aleksa Popović made 2 appearances, scoring 0 goals and adding 0 assists. He averaged 0 goals per match from 0 shots, with 0 on target.