01/By surface
each with its own count, at equal weight
Hard
2-0
S. leads 2-0 in 2 meetings on hard
Clay
1-0
S. leads 1-0 in 1 meeting on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
3 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, S. first |
|---|---|---|---|---|---|---|
| May 15, 2016 | Internazionali BNL d'ItaliaPremier | clay | final | Williams S. | 7-6, 6-3 | 1 v 24 |
| Sep 6, 2015 | US OpenGrand Slam | hard | 4th round | Williams S. | 6-3, 6-3 | 1 v 19 |
| Jan 29, 2015 | Australian OpenGrand Slam | hard | semifinal | Williams S. | 7-6, 6-2 | 1 v 35 |
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. Williams S. and Keys M. each carry the table against every opponent faced.