Twenty-one of 25 former champions were, had been, or would be ranked in the Top 20.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2015 |
BNP Paribas WTA Finals Singapore Red Group
|
Championship | Maria Sharapova |
7-5
6-1 |
| 2015 |
BNP Paribas WTA Finals Singapore Red Group
|
Championship | Flavia Pennetta |
6-7
4-6 |
| 2015 |
BNP Paribas WTA Finals Singapore Red Group
|
Championship | Simona Halep |
6-0
6-3 |
| 2015 |
Kremlin Cup By Bank Of Moscow
|
Quarter Finals | Lesia Tsurenko | |
| 2015 |
Kremlin Cup By Bank Of Moscow
|
1/8 | Flavia Pennetta |
6-2
6-4 |
| 2015 |
Tianjin Open
|
1/16 | Lyudmyla Kichenok |
3-6
5-7 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2020 |
Adria Tour, Group B
|
Championship | Danilo Petrovic |
2-4
2-4 |
| 2020 |
Adria Tour, Group B
|
Championship | Alexander Zverev |
4-3
0-4 4-3 |
| 2020 |
Adria Tour, Group B
|
Championship | Andrey Rublev |
4-3
2-4 4-1 |
| 2020 |
Davis Cup Qualifying Round
|
Championship | Marin Cilic |
7-6
7-6 |
| 2020 |
Dubai Tennis Championships
|
1/16 | Benoit Paire |
6-2
5-7 6-7 |
