Ruzici, who became a professional player in 1975, won nine singles and 12 doubles titles in her career.
The highlight of her career was the 1978 French Open , where she won the title in both singles and doubles ; also she was there in the mixed final. In the individual she defeated last year's winner Mima Jaušovec 6: 2 and 6: 2, with whom she secured the double title of the Grand Slam tournament with a three-set victory over Lesley Bowrey and Gail Lovera .