Mezue ahịrịokwu na-esonụ: Velimir gbara asọmpi na 2009 European Youth Olympic Festival. O ritere ihe nrite ọla edo na 100m butterfly na ọlaọcha na 100m Freestyle. Na 2010 Youth Olympic Games, ọ bụ onye na-ebu ọkọlọtọ Serbia ma merie nrite abụọ, ọlaọcha na 100m Freestley na ọla nchara na 100m butterfly ya mere Kọmitii Olimpik nke Serbia kwupụtara ya ka ọ bụrụ onye egwuregwu kacha mma na 2010. Stjepanović nwetara ihe nrite ọla edo na 100m freestyle na 100m butterfly na
2011 European Junior Swimming Championships.