01/By surface
each with its own count, at equal weight
Hard
6-0
S. leads 6-0 in 6 meetings on hard
Clay
Never on clay
no meeting on this surface
Grass
Never on grass
no meeting on this surface
02/Every meeting
6 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, S. first |
|---|---|---|---|---|---|---|
| Mar 19, 2016 | BNP Paribas OpenPremier | hard | semifinal | Williams S. | 6-4, 7-6 | 1 v 3 |
| Jan 28, 2016 | Australian OpenGrand Slam | hard | semifinal | Williams S. | 6-0, 6-4 | 1 v 4 |
| Oct 23, 2013 | Sony Ericsson ChampionshipsTour Championships | hard | round robin | Williams S. | 6-2, 6-4 | 1 v 4 |
| Oct 5, 2013 | China OpenPremier | hard | semifinal | Williams S. | 6-2, 6-2 | 1 v 4 |
| Aug 10, 2013 | Rogers CupPremier | hard | semifinal | Williams S. | 7-6, 6-4 | 1 v 4 |
| Mar 29, 2013 | Sony Ericsson OpenPremier | hard | semifinal | Williams S. | 6-0, 6-3 | 1 v 4 |
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 Radwanska A. each carry the table against every opponent faced.