Twenty-one of 25 former champions were, had been, or would be ranked in the Top 20.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2005 |
Indian Wells Masters
|
Championship | Mary Pierce |
4-6
4-6 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2006 |
Generali Ladies Linz
Austria, Linz |
Championship | Vera Zvonareva |
6-4
6-6 |
| 2006 |
Zurich Open
Switzerland, Zurich |
Championship | Katarina Srebotnik |
6-3
7-5 |
| 2006 |
Porsche Tennis Grand Prix
Germany, Stuttgart |
Championship | Jelena Jankovic |
7-6
6-3 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2015 |
Tianjin Open
|
1/16 | Ying-Ying Duan |
3-6
3-6 |
| 2015 |
Tianjin Open, Qualification
|
Quarter Finals | Nicole Vaidisova |
6-1
5-7 6-4 |
| 2015 |
Tianjin Open, Qualification
|
1/8 | Nicole Vaidisova |
4-6
1-6 |
| 2015 |
Tianjin Open, Qualification
|
1/16 | Nicole Vaidisova |
6-3
2-6 0-6 |
