premise: Hana Mandlikova and Wendy Turnbull were the defending champions but they competed with different partners that year, Mandlikova with Jana Novotna and Turnbull with Elizabeth Smylie.
hypothesis: Hana Mandlikova and Wendy Turnbull were the defending champions but they competed with different partners that year, Mandlikova with Jana Novotna and Squire with Elizabeth Smylie.