Li Na, Sara Errani, and Petra Kvitova win their matches on Day 4 of the WTA Championships in Istanbul, Turkey.
(4) Li Na (CHN) d. (2) Victoria Azarenka (BLR) — 6-2, 6-1
(6) Sara Errani (ITA) d. (7) Jelena Jankovic (SRB) — 6-4, 6-4
(5) Petra Kvitova (CZE) d. (8) Angelique Kerber (GER) — 6-7(3), 6-2, 6-3
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Schedule of play for Saturday, October 26, 2013:
Center Court (Not Before 15.00hrs)
1. Li Na vs. Petra Kvitova
2. Serena Williams vs. Jelena Jankovic