A skilled and tenacious player, Tiriac was at his best on hardcourts. He played Davis Cup for Romania from 1959 through the mid-seventies mising only the 1973 Cup. After winning the Romanian Closed title for eight straight years, he lost it in 1967. In 1970 he won both the Italian and French Open doubles titles teaming with Illie Nastase.
Inducted into International Tennis Hall of Fame in July 2013.