6-3
N. leads 6-3, 9 meetings, 2017 to 2026, 1 walkover not counted
01/By surface
each with its own count, at equal weight
Hard
4-3
N. leads 4-3 in 7 meetings on hard
Clay
Never on clay
no meeting on this surface
Grass
2-0
N. leads 2-0 in 2 meetings on grass
02/Every meeting
10 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, N. first |
|---|---|---|---|---|---|---|
| Aug 7, 2026 | Canadian OpenWTA1000 | hard | 3rd round | Osaka N. | 6-1, 6-2 | 13 v 23 |
| Jun 23, 2026 | Bad Homburg OpenWTA250 | grass | 2nd round | Osaka N. | 6-3, 6-3 | 15 v 26 |
| Aug 9, 2024 | Canadian OpenWTA1000 | hard | 2nd round | Mertens E. | 6-3, 6-4 | 95 v 35 |
| Jun 11, 2024 | Rosmalen Grass Court ChampionshipsWTA250 | grass | 1st round | Osaka N. | 6-2, 6-4 | 125 v 32 |
| Mar 11, 2024 | BNP Paribas OpenWTA1000 | hard | 3rd round | Mertens E. | 7-5, 6-4 | 287 v 28 |
| Mar 29, 2021 | Miami OpenWTA1000 | hard | 4th round | Osaka N. | 6-3, 6-3 | 2 v 17 |
| Feb 6, 2021 | Gippsland TrophyWTA500 | hard | semifinal | Mertens E.walkover, not counted | no set played | 3 v 20 |
| Aug 28, 2020 | Western & Southern Financial Group Women's OpenPremier | hard | semifinal | Osaka N. | 6-2, 7-6 | 10 v 22 |
| Sep 21, 2019 | Toray Pan Pacific Open Tennis TournamentPremier | hard | semifinal | Osaka N. | 6-4, 6-1 | 4 v 24 |
| Sep 25, 2017 | Wuhan OpenPremier | hard | 1st round | Mertens E. | 6-4, 1-6, 6-4 | 61 v 38 |
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. Osaka N. and Mertens E. each carry the table against every opponent faced.