 With Romania's Gabriel Trifu as his partner, Kokavec participated in the men's doubles draw at the 1999 Wimbledon Championships.Playing as qualifiers, the pair defeated Alberto Martín and Eyal Ran in the first round, then were eliminated by top seeds and eventual champions Mahesh Bhupathi and Leander Paes.In 2001 he had success on the Challenger tour with three titles, all in doubles, at Granby, Binghamton and the Bronx.