Kammala jumla mai zuwa: Janković ya yi nasarar yin wasan kwaikwayon ga rukunin matasa na wakilci. A Gasar Zakarun Turai ta Under-18 ya lashe lambobin yabo biyu - azurfa a Poland 2011 da tagulla a Lithuania/Latvia 2012. A shekarar 2013 ya kasance wani bangare na tawagar da ta samu lambar azurfa a gasar
Gasar cin kofin duniya ta 'yan kasa da shekara 19. A cikin 2014 ya sake lashe lambar tagulla - a wannan karon tare da ƙungiyar matasa a Gasar Turai ta Under-20. An kira shi a cikin cikakkiyar wasannin biyar, yana da maki 15.5 da 9.1 a kowane wasa.