Career
He started his career as a sprinter specializing in the 100 metres run, and competed at the 2000 Olympic Games. Some years later he took up bobsleigh, participating in the 2006 Olympic Games. He was working as a fitness coach for former Women's Tennis Association Number.
1 player Dinara Safina (2008-2010).
From 2010-2012 he was a fitness coach of Slovak Women's Tennis Association player Dominika Cibulkova. After that, in 2010. he had a short cooperation with another Women's Tennis Association player from Serbia, Jelena Jankovic.
Currently he is working as a fitness coach for Women's Tennis Association player Laura Robson from United Kingdom. He was born in Split, and belonged to the sports club Atletski Sportski Klub based in Split.
His first major international event was the 2000 Olympic Games.
He competed in the 100 metres event, but without progressing from the first round. He also competed with the Croatian team in the 4 x 100 metre relay, but was knocked out in the heats here as well. He later managed to reach the quarter-final at the 2002 European Championships, and the semi-final at the 2002 European Indoor Championships, the 2003 World Indoor Championships and the 2004 World Indoor Championships.
He came close to his personal best time on several occasions, running seasons bests of 10.32 seconds in 2002, 10.34 seconds in 2003 and 10.36 seconds in 2004.
However, he retired from international athletics after the 2004 season. After his retirement from athletics, Vojnović took up bobsleigh, participating in the 2006 Winter Olympics in Turin, as a part of the national four-man bobsleigh team
The team also consisted of then 44-year-old Ivan Šola, as well as two athletes, Jurica Grabušić and Slaven Krajačić. The bobsleigh team finished in 23rd place overall.
Vojnović stands 1.82 m (5 ft 11 1⁄2 in) tall, and during his active career he weighed 82–83 kilograms (181–183 lb).