01/By surface
each with its own count, at equal weight
Hard
0-1
N. leads 1-0 in 1 meeting on hard
Clay
Never on clay
no meeting on this surface
Grass
0-2
N. leads 2-0 in 2 meetings on grass
02/Every meeting
3 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, K. first |
|---|---|---|---|---|---|---|
| Feb 3, 2021 | Gippsland TrophyWTA500 | hard | 3rd round | Osaka N. | 3-6, 6-3, 6-1 | 371 v 3 |
| Jul 5, 2018 | WimbledonGrand Slam | grass | 2nd round | Osaka N. | 6-3, 6-4 | 122 v 18 |
| Jun 18, 2018 | AEGON ClassicPremier | grass | 1st round | Osaka N. | 6-1, 6-2 | 139 v 18 |
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. Boulter K. and Osaka N. each carry the table against every opponent faced.