 Nyorai kuenderera mberi kweiyi ndima - Vlasic akatanga mwaka zvakanaka nemenduru yebronze pa2004 IAAF World Indoor ChampionshipsMuna March. Aigara achikwira pachikuva pamisangano mumwaka wekunze uye akakunda mumakwikwi emunyika muna 2004. Kurekodha kweCroatia kusvetuka kwemamita 2.03 muLjubljana kwakamuisa panzvimbo yakanaka ye2004 Athens Olimpiki. Zvisinei, paakakwikwidza mumakwikwi ekupedzisira eOlympic akakwanisa chete nzvimbo yegumi neimwe nekusvetuka kwemamita 1.89. Kutevera izvi, Vlašić haana kukwikwidza kweinenge gore: akabvuma kuti ainzwa kusagadzikana uye nguva pfupi yapfuura akaonekwa aine hyperthyroid mamiriro. 