Kosta Nedeljković

Red Star Belgrade

A product of Red Star Belgrade's youth academy, Nedeljković signed his first professional contract with the club in February 2021, which was later extended until December 2022. He played for the club's youth teams until January 2023. On 26 June 2023, Nedeljković made his senior debut in a pre-season friendly match against FK Sloboda Užice after he was promoted to the 2023–24 season by coach Barak Bakhar.

Grafičar Beograd (loan)

In January 2023, he was loaned, together with Aleksej Vukičević and Stefan Radujko, to Serbian First League team Grafičar Beograd for the second half of the 2022–23 season. Nedeljković had 17 appearances for the Grafičar, scoring his first goal on 16 March 2023 and recorded a top speed 36.4 km/h against FK Zlatibor Čajetina, that was comparable to Kylian Mbappé, Achraf Hakimi, and Erling Haaland.

Aston Villa

On 22 January 2024, Nedeljković signed for Premier League club Aston Villa, remaining at Red Star on loan until the end of the season. The transfer fee was undisclosed, but it was reported to be around £8 million plus add-ons. After returning to Red Star on loan, Nedeljković suffered a knee injury during a warm weather training camp in Cyprus in the league's winter break and spent time on the sidelines. On 17 August 2024, 18-year-old Nedeljković made his Premier League debut as a substitute in a 2–1 opening day victory against West Ham United. He became the 1000th player to represent Aston Villa in…

Nedeljković represented three Serbian youth teams ranged from U17 to U19. In 2023, he was invited to train with the senior Serbia national team, but excluded in the senior squad of any matches. On 30 August 2024, Nedeljković received his first call-up to the Serbian senior squad ahead of its upcoming 2024–25 UEFA Nations League matches. The same year on 5 September, he made his international senior debut in a goalless Nations League draw against Spain.

Club

As of match played 20 August 2026

International

As of match played 9 September 2025

Red Star Belgrade

Serbian SuperLiga: 2023–24 Serbian Cup: 2023–24 Aston Villa

UEFA Super Cup runner up: 2026–27