Twenty-one of 25 former champions were, had been, or would be ranked in the Top 20.
| 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 |
|---|---|---|---|---|
| 2020 |
International Premier League A
|
Championship | Mischa Zverev |
6-4
6-3 |
| 2020 |
International Premier League A
|
Championship | Mischa Zverev |
4-6
3-6 |
| 2020 |
International Premier League A
|
Championship | Mischa Zverev |
3-6
5-7 |
| 2020 |
International Premier League A
|
Championship | Mischa Zverev |
4-6
7-5 1-6 |
| 2020 |
International Premier League A
|
Championship | Mischa Zverev |
5-7
1-6 |
| 2020 |
International Tennis Series
|
Championship | James Cerretani |
2-4
0-0 |
| 2020 |
International Tennis Series
|
Championship | Paolo Lorenzi |
4-2
4-2 |
