during her career fox played in all four grand slam tournaments. her best result was reaching the doubles final at the 1977 french open with helen cawley in which they were defeated in three sets by regina maršíková and pam teeguarden. her best result in singles occurred in 1977 when she reached the quarterfinals at the australian open in which she lost to second-seeded sue barker. at the wimbledon championships, she reached the third round in 1977 and 1979.