C. Gauff leads the head-to-head 3-0 since 2018 against S. Sierra, over 3 matches.
| Surface | S. Sierra | C. Gauff |
|---|---|---|
| Grass | 0 | 1 |
| Clay | 0 | 1 |
| Hard | 0 | 1 |
| Date | Winner | Score | Event |
|---|---|---|---|
| July 1, 2026 | C. Gauff | 2 - 1 | Wimbledon · 1/32-finals · grass |
| May 9, 2026 | C. Gauff | 2 - 1 | Rome · 1/16-finals · clay |
| Jan. 3, 2026 | C. Gauff | 2 - 0 | WTA United Cup · hard |