Serena Williams defeated Na Li 7-5 7-5 in the Cincinnati semi-final on hard. The result followed the form book — Serena Williams came in leading the head-to-head 7–1, defending last year's quarter-final. Serena Williams extended the head-to-head to 8–1.
Williams S. took it in straight sets.
Williams S. and Li N. faced 17 of the same opponents in the last 12 months. Williams S. went 23–1 (96%) against them, Li N. 15–7 (68%). Williams S. came out better against 4 of 16 comparable opponents, Li N. against 0.
Hard: Williams S. leads 6–0 · Clay: level 1–1 · Grass: Williams S. leads 1–0
Serena Williams beat Na Li 7-5 7-5. Umpiry, "Serena Williams vs Na Li — Cincinnati Semi-final", https://umpiry.com/match/2013-08-17/li-vs-williams-cincinnati-sf?utm_source=cite (as of 17 August 2013).