Na Li defeated Bethanie Mattek Sands 6-4 6-3 in the Stuttgart semi-final on clay. The result followed the form book — Na Li came in defending last year's quarter-final. Na Li extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-27 | Roland Garros | R64 | clay | Bethanie Mattek Sands | 5-7 6-3 6-2 |
| 2011-05-02 | Madrid | QF | clay | Na Li | 6-4 3-6 6-4 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (81 vs 177). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About