Kammala jumla mai zuwa: An haife shi a Zagreb, Ivančević ya fara wasan motsa jiki tun yana ƙarami amma ya koma wasan motsa jiki yana da shekara 15 bayan shekaru goma da ba ta yi nasara sosai a wasanta na baya ba. Maimakon haka, ta mai da hankali kan yin gasa, ta yi gasa a duniya a matsayin matashi kuma ta yi gudu a cikin zafin duka 2001 Youth World da 2002 World Junior Championships a Wasannin motsa jiki. Ta gudanar da rikodin matasan Croatia a wannan taron na baya. A hankali ta inganta kyawawan halayenta a farkon lokutanta na farko a matsayin babbar 'yar wasa, tana da mafi kyawun sakan 13.86 don shingen mita 100 a 2003, 13.64 a 2004, sannan 13.60 a 2005. Ta yi gasa ne kawai a cikin zafin jiki na
Gasar zakarun Turai ta 2005 ta U23 kuma ta fara wasan farko a gasar zakarun Turai ta 2006, kuma kawai ta yi gasa a cikin zafin jiki. Kyakkyawan sirri na 13.42 seconds ya zo a shekara ta 2006, amma wani bayyanar a 2007 Summer Universiade ya sake ganin ta sake kasa wucewa.