Twenty-one of 25 former champions were, had been, or would be ranked in the Top 20.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2019 |
Seville
|
1/32 | Inigo Cervantes |
3-6
0-6 |
| 2019 |
Mallorca
|
1/32 | Matteo Viola |
2-6
2-6 |
| 2019 |
Segovia
|
1/32 | Frederico Gil |
6-7
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 |
