01/By surface
each with its own count, at equal weight
Hard
3-0
M. leads 3-0 in 3 meetings on hard
Clay
1-0
M. leads 1-0 in 1 meeting on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
4 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, M. first |
|---|---|---|---|---|---|---|
| Aug 4, 2023 | Citi OpenWTA500 | hard | quarterfinal | Sakkari M. | 6-3, 6-3 | 9 v 16 |
| Apr 29, 2022 | Mutua Madrid OpenWTA1000 | clay | 1st round | Sakkari M. | 6-7, 6-3, 6-4 | 5 v 22 |
| Mar 3, 2021 | Qatar Total OpenWTA500 | hard | 2nd round | Sakkari M. | 6-2, 6-2 | 25 v 19 |
| Jan 24, 2020 | Australian OpenGrand Slam | hard | 3rd round | Sakkari M. | 6-4, 6-4 | 23 v 11 |
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. Sakkari M. and Keys M. each carry the table against every opponent faced.