I. Swiatek leads the head-to-head 7-5 since 2018 against J. Pegula, over 12 matches.
| Date | Winner | Score | Event |
| May 13, 2026 | I. Swiatek | 2 - 0 | Rome · Quarter-finals · clay |
| June 28, 2025 | J. Pegula | 2 - 0 | Bad Homburg · Final · grass |
| Sept. 5, 2024 | J. Pegula | 2 - 0 | WTA US Open · Quarter-finals · hard |
| Nov. 6, 2023 | I. Swiatek | 2 - 0 | WTA Finals - Cancun · Final · hard |
| Aug. 12, 2023 | J. Pegula | 2 - 1 | WTA Montreal · Semi-finals · hard |
| Feb. 18, 2023 | I. Swiatek | 2 - 0 | Doha · Final · hard |
| Jan. 6, 2023 | J. Pegula | 2 - 0 | WTA United Cup · hard |
| Oct. 15, 2022 | I. Swiatek | 2 - 1 | San Diego · Semi-finals · hard |
| Sept. 8, 2022 | I. Swiatek | 2 - 0 | US Open · Quarter-finals · hard |
| June 1, 2022 | I. Swiatek | 2 - 0 | French Open · Quarter-finals · clay |
| April 1, 2022 | I. Swiatek | 2 - 0 | Miami · Semi-finals · hard |
| July 31, 2019 | J. Pegula | 2 - 1 | Washington · 1/8-finals · hard |