Na Li defeated Sara Errani 6-3 7-6 in the WTA Championships round robin on hard. The result followed the form book — Na Li came in leading the head-to-head 5–1, defending last year's round-robin. Na Li extended the head-to-head to 6–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-05-12 | Rome | QF | clay | Sara Errani | 6-3 4-6 6-2 |
| 2012-08-06 | Montreal | R16 | hard | Na Li | 6-4 6-2 |
| 2010-08-09 | Cincinnati | R32 | hard | Na Li | 6-2 6-2 |
| 2010-05-17 | Warsaw | QF | clay | Na Li | 6-2 6-1 |
| 2010-04-26 | Stuttgart | R32 | clay | Na Li | 6-1 6-1 |
| 2008-08-25 | US Open | R64 | hard | Na Li | 4-6 6-2 6-0 |
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 200). ATP, WTA & Challenger.