01/By surface
each with its own count, at equal weight
Hard
1-0
R. leads 1-0 in 1 meeting on hard
Clay
Never on clay
no meeting on this surface
Grass
1-0
R. leads 1-0 in 1 meeting on grass
02/Every meeting
2 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, R. first |
|---|---|---|---|---|---|---|
| Mar 6, 2025 | BNP Paribas OpenWTA1000 | hard | 1st round | Montgomery R. | 3-6, 7-5, 6-2 | 107 v 120 |
| Jun 13, 2024 | Rosmalen Grass Court ChampionshipsWTA250 | grass | 2nd round | Montgomery R. | 6-3, 6-3 | 173 v 91 |
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. Montgomery R. and Niemeier J. each carry the table against every opponent faced.