The Championship side reached the quarter-finals of the competition after a 2-1 home victory over League One side Leeds United.

Zadkovich came on at the start of the second half while Socceroo Sterjovski entered the fray for the final nine minutes.

Emanuel Villa opened the scoring for Derby in the sixth minute and Nathan Ellington then doubled the home side's advantage on 18 minutes.

Luciano Becchio pulled a goal back for Leeds five minutes before the interval and the Whites pressed hard for an equaliser in the second half.

Zadkovich's Olyroo teammate Neil Kilkenny played 80 minutes for Leeds before being replaced by Jonny Howson.