Doi was the first to reach the semifinals, where she awaits Bertens or Riske.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2014 |
Portugal Open
|
1/16 | Yaroslava Shvedova |
6-2
6-4 |
| 2008 |
Proximus Diamond Games
Belgium, Antwerp |
Championship | Karin Knapp |
6-3
4-6 2-6 |
| 2007 |
New Haven Open at Yale, Qualification
|
Championship | Karin Knapp |
3-6
4-6 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2017 |
Australian Open WTA
|
1/64 | Su-Wei Hsieh |
3-6
0-2 |
| 2016 |
US Open WTA
United States, New York, Flushing Meadows |
1/64 | Johanna Larsson |
4-6
2-6 |
| 2016 |
Cincinnati Masters, Qualification
|
1/12 (Special Qual) | Kurumi Nara |
6-1
7-5 |
| 2016 |
Cincinnati Masters, Qualification
|
1/24 (Special Qual) | Karin Knapp |
7-6
3-6 6-4 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2020 |
Qatar Total Open
|
1/32 | Laura Siegemund |
6-3
6-2 |
