Adrian Zeljković

Zeljković started playing football in his hometown of Žalec. He went on to play for the youth teams of several Slovenian football clubs, including Maribor, Celje and Olimpija Ljubljana, the latter of which he made his senior debut. Zeljković joined Slovak club Spartak Trnava in July 2023, signing a four-year contract. On 12 May 2025, Zeljković signed a four-year contract with Czech First League club Viktoria Plzeň for a reported transfer fee of €1.5 million. He made his European debut for the club in a 3–1 win over Servette, where he got sent off in the 66th minute. On 3 February 2026, Zeljković joined MTK Budapest on a half-year loan deal with an option to make the transfer permanent.

In November 2023, Zeljković scored his first goal for the Slovenia under-21 team in a 1–1 friendly draw against Turkey. He made his debut for the senior team in a January 2024 friendly against the United States that ended 1–0 in Slovenia's favor thanks to a goal from Nejc Gradišar.

Zeljković's older brother Aleksandar is also a footballer.

Spartak Trnava

Slovak Cup: 2024–25 Individual

Spartak Trnava Footballer of the Year: 2024