Darko Kostić (Serbian Cyrillic: Дарко Костић, Greek: Ντάρκο Ράλλη (Ntarko Rallis); born 30 September 1978) is a Serbian–Greek professional basketball coach and former player.
Rallis had two stints with the Belgian team Okapi Aalstar where played during 1998–99 and 2000–01 season.[1] In between he played for the German team Ratiopharm Ulm.[1][2] In 2003, he moved to Slovakia where he played for two seasons for Chemosvit Svit and MBK Lučenec.[3] Also, he played for the Ecuadorian team Salesianos Club Guayaquil.[4]
On 2 November 2011 Rallis signed for Doxa Lefkadas of the Greek A2 League.[5] He also played for the Greek A2 League teams Ermis Lagkada, and Livadeia.
Prior to the 2016–17 season Kostić was named as a head coach of OKK Beograd after one year he spent there as an assistant coach of the head coach Vlade Đurović.[6] He left the club in June 2018.
On 30 July 2018 Kostić became a head coach for Bulgarian team Academic Bultex 99.[7] On 27 December 2018 Academic parted ways with him following the loss against Beroe.[8]
On 4 January 2019, Kostić was named as a head coach of Vršac of the Basketball League of Serbia.[9] In February 2020, he left Vršac.
On 16 June 2020, Kostić became a head coach for Novi Pazar.[10][11]
Pound sign (#) denotes interim head coach.