He is a two-time winner of the World Cup and one of only three table tennis players to have competed at seven Olympic Games.

Primorac was born in Zadar and started playing table tennis at the club STK "Bagat" in his home town.

At 2008 Summer Olympics Primorac lost in the quarter-final of the men's singles event to Jörgen Persson.

At the 2007 European Championship in Belgrade he won the silver medal in the team event with Croatia (with Roko Tošić, Andrej Gaćina and Tan Ruiwu).

At the Mediterranean Games in the men's singles event he won gold medal in 1987, silver in 1993 and 1997 and bronze in 1991.