|Olympic medal record|
His teammates at Sydney were Branimir Vujević, Nikša Skelin, Siniša Skelin, Krešimir Čuljak, Tomislav Smoljanović, Tihomir Franković, Igor Francetić and Silvijo Petriško (coxswain). Boraska also participated at the 1996 Summer Olympics and at the 2004 Summer Olympics, both time in coxless four discipline. He was a World champion and a medalist at the World Rowing Championships.
He was a world record (world's best time) holder, for 20 years, in a coxed pair event set at 1994 World rowing championship.
Boraska retired from competitive rowing in 2010.
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