Kerry's early years were spent under the guidance of J Hildebrands (Snr), before being coached by Harry Hopman and trained by Stan Nicholes.

In 1968, Harris started on the International tour, the first year in the open era, and she was chosen to be a part of Lawn Tennis Association of Australia's Touring Team with Harry Hopman as manager.

Kerry first reached a Grand Slam final in the 1971 French Open Women's Doubles, partnering Helen Gourlay, which they lost in two sets to defending champions Françoise Dürr and Gail Chanfreau.

Kerry won the final of the 1972 Australian Open Women's Doubles tournament partnered with Helen Gourlay, beating Patricia Coleman-Clegg and Karen Krantzcke.

In the women's singles, seeded number 6, she reached the semifinals, losing to eventual champion Virginia Wade in three sets.