01/By surface
each with its own count, at equal weight
Hard
0-1
J. leads 1-0 in 1 meeting on hard
Clay
1-0
K. leads 1-0 in 1 meeting on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
2 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, K. first |
|---|---|---|---|---|---|---|
| May 26, 2026 | French OpenGrand Slam | clay | 1st round | Birrell K. | 1-6, 6-3, 6-3 | 83 v 5 |
| Aug 10, 2025 | Western & Southern Financial Group Women's OpenWTA1000 | hard | 2nd round | Pegula J. | 6-4, 6-3 | 82 v 4 |
A record, never a share of meetings. Main-draw singles since 2013; a meeting ended by retirement is counted with the sets that were played and marked; a walkover is listed and counted in neither column. Birrell K. and Pegula J. each carry the table against every opponent faced.