Ai Sugiyama advanced when Dominika Cibulkova retired 6-7 7-6 5-3 in the Stanford quarter-final.
Sugiyama A. advanced when Cibulkova D. retired.
Sugiyama A. and Cibulkova D. faced 8 of the same opponents in the last 12 months. Sugiyama A. went 3–7 (30%) against them, Cibulkova D. 2–6 (25%). Results against comparable opponents are close (2 : 1 better-results split).
Ai Sugiyama beat Dominika Cibulkova 6-7 7-6 5-3 after Dominika Cibulkova retired. Umpiry, "Ai Sugiyama vs Dominika Cibulkova — Stanford Quarter-final", https://umpiry.com/match/2008-07-14/cibulkova-vs-sugiyama-stanford-qf?utm_source=cite (as of 14 July 2008).