Karolina Pliskova defeated Sloane Stephens 7-6 6-2 in the Australian Open round of 128 on hard. The upset overturned the form book — Sloane Stephens came in leading the head-to-head 5–0, defending last year's round of 128. Karolina Pliskova claimed a first win over Sloane Stephens in six meetings, narrowing the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-05-29 | Roland Garros | R128 | clay | Sloane Stephens | 6-0 6-4 |
| 2021-06-03 | Roland Garros | R64 | clay | Sloane Stephens | 7-5 6-1 |
| 2018-10-27 | Singapore | SF | hard | Sloane Stephens | 0-6 6-4 6-1 |
| 2015-10-04 | Beijing | R64 | hard | Sloane Stephens | 6-3 6-2 |
| 2012-06-25 | Wimbledon | R128 | grass | Sloane Stephens | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.