Twenty-one of 25 former champions were, had been, or would be ranked in the Top 20.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2019 |
San Luis Potosi
|
1/16 | Joao Souza |
6-3
6-4 |
| 2019 |
Santiago
|
1/16 | Facundo Arguello |
6-4
3-6 4-6 |
| 2019 |
Santiago
|
1/32 | Joao Souza |
6-1
6-3 |
| 2019 |
Brasil Open, Qualification
|
1/8 | Alessandro Giannessi |
7-6
6-3 |
| 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 |
