Twenty-one of 25 former champions were, had been, or would be ranked in the Top 20.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2014 |
AEGON International
|
1/16 | Daniela Hantuchova |
7-5
6-1 |
| 2014 |
Mutua Madrid Open
|
1/32 | Roberta Vinci |
4-6
4-6 |
| 2012 |
Qatar Airways Tournament of Champions Serdika group
|
Championship | Roberta Vinci |
6-1
6-2 |
| 2012 |
Apia International Sydney
Australia, Sydney |
1/16 | Daniela Hantuchova |
5-7
2-6 |
| 2010 |
BNP Paribas Open
United States, California, Indian Wells |
Championship | Roberta Vinci |
3-6
5-7 |
| 2009 |
Unicef Open
|
Championship | Daniela Hantuchova |
6-7
4-6 |
| 2007 |
Toray Pan Pacific Open
Japan, Tokyo |
Championship | Roberta Vinci |
4-6
4-6 |
| year | Event | RND | Winner | Results |
|---|
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2018 |
Internazionali BNL d'Italia
|
1/32 | Aleksandra Krunic |
2-6
6-0 6-3 |
| 2018 |
Swiss Women's Championship, Qualification
|
1/12 (Special Qual) | Kathinka Von Deichmann |
6-1
6-3 |
| 2018 |
Miami Open, Qualification
|
1/12 (Special Qual) | Viktorija Golubic |
4-6
3-6 |
| 2018 |
Miami Open, Qualification
|
1/24 (Special Qual) | Roberta Vinci |
7-5
1-6 2-6 |
