 Complete the following phrase:  On 22 March 2013, Đurđević made his debut for Serbia at under-21 level in a 12 friendly loss away against the Netherlands U21s. He scored his first goal for the team on 14 August 2013, in a 41 home friendly win over the Macedonia under-21 side. Afterwards, Đurđević was their regular member during the UEFA Under-21 Championship 2015 qualifying stage, as Serbia qualified to the 