Serena Williams defeated Simona Halep 6-3 7-6 in the Cincinnati final on hard. The result followed the form book — Serena Williams came in leading the head-to-head 9–2, defending the title. Serena Williams extended the head-to-head to 10–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-02-08 | Australian Open | QF | hard | Serena Williams | 6-3 6-3 |
| 2019-07-01 | Wimbledon | F | grass | Simona Halep | 6-2 6-2 |
| 2019-01-14 | Australian Open | R16 | hard | Serena Williams | 6-1 4-6 6-4 |
| 2016-08-29 | US Open | QF | hard | Serena Williams | 6-2 4-6 6-3 |
| 2016-03-07 | Indian Wells | QF | hard | Serena Williams | 6-4 6-3 |
| 2015-03-23 | Miami | SF | hard | Serena Williams | 6-2 4-6 7-5 |
| 2014-10-20 | WTA Finals | RR | hard | Simona Halep | 6-0 6-2 |
| 2014-10-20 | WTA Finals | F | hard | Serena Williams | 6-3 6-0 |
| 2013-08-12 | Cincinnati | QF | hard | Serena Williams | 6-0 6-4 |
| 2013-05-13 | Rome | SF | clay | Serena Williams | 6-3 6-0 |
| 2011-06-20 | Wimbledon | R64 | grass | Serena Williams | 3-6 6-2 6-1 |
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 (199 vs 198). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About