O'Neill had a similar experience in women's doubles, reaching the final twice (in 1961 with Mary Bevis Hawton and 1963 with Lesley Turner Bowrey) but losing each time to a team that included Court (with Mary Carter Reitano in 1961 and Robyn Ebbern in 1963).
Her best Grand Slam singles result was when she reached the final at the 1959 Australian Championships, losing to Mary Carter Reitano 6–2, 6–3.
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