In 1964 he won the
Moscow International Championships against countryman
Boro Jovanović in five sets. Pilic reached the semifinals of Wimbledon in 1967, beating
Roy Emerson. Then open tennis arrived and Pilić was one of the
Handsome Eight, a group of players signed by
Lamar Hunt in 1968 for the newly formed professional
World Championship Tennis (WCT) group. In 1970, Pilić won the
Bristol Open or West of England Championships defeating
Tom Okker in a long match,
Graham Stilwell,
Marty Riessen,
John Newcombe in a close match, and
Rod Laver in the final. Also that season, Pilić won the men's doubles title at the
US Open with his French partner
Pierre Barthès by defeating the Australians
John Newcombe and
Rod Laver in four sets. His best singles performance at a Grand Slam tournament came in 1973 when he reached the final of the French Open, losing to
Ilie Năstase in straight sets. Pilić was the catalyst to the
1973 Wimbledon boycott. In May 1973, the Yugoslav tennis federation alleged that Pilić had refused to represent them in a
Davis Cup tie against New Zealand earlier that month. Pilić denied the charge, but was suspended by the federation, and the suspension was upheld by the
ILTF, albeit decreased from nine months to one month, meaning that he could not enter the Wimbledon Championships. In protest at the suspension, 81 of Pilić's fellow professionals, organized into the
Association of Tennis Professionals (ATP), and including 13 of the 16 seeds, withdrew from the 1973 Wimbledon Championships. ==Post-playing==