Williams became the first in history to own a career Golden Slam in singles and doubles.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2008 |
Rogers Cup presented by National Bank
Canada, Quebec, Montreal |
Championship | Jelena Jankovic |
3-6
2-6 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2014 |
Bell Challenge
|
1/16 | Julia Goerges |
6-1
6-2 |
| 2014 |
Rogers Cup
|
1/32 | Garbine Muguruza |
6-1
6-7 6-2 |
| 2014 |
Rogers Cup, Qualification
|
1/12 (Special Qual) | Stephanie Dubois |
6-2
3-6 6-3 |
| 2014 |
Rogers Cup, Qualification
|
1/24 (Special Qual) | Stephanie Dubois |
0-6
4-6 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2017 |
US Open WTA
|
1/64 | Petra Kvitova |
7-5
7-5 |
| 2017 |
Citi Open
|
1/16 | Oceane Dodin |
6-4
3-6 0-2 |
| 2017 |
NanChang Open
|
1/8 | Jing-Jing Lu |
2-6
6-1 6-2 |
