Among Račič's sixteen international appearances for the country were the 1946 European Athletics Championships in Oslo and the 1950 edition in Brussels, as well as several editions of the Balkan Games. During this time, at the 1948 Summer Olympics in London, he was eliminated in the semifinals of the men's 400 metres competition and did not make it out of the opening round of the men's 4 x 400 metres relay. He was not permitted to bring a sports trainer, but was instead accompanied by a political agent to ensure that he did not stray from his nation's communist ideology. He achieved his personal best time of 49 seconds at 400 metres the following year. Throughout his career he set over twenty national records at various sprint distances.