Sevastova had 30 winners and 28 unforced errors as she won her third singles title.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2018 |
Montevideo
|
1/8 | Pedro Sousa |
6-1
6-3 |
| 2018 |
Guayaquil
|
Final | Guido Andreozzi |
5-7
6-1 4-6 |
| 2018 |
Guayaquil
|
Semi Finals | Guido Andreozzi |
6-4
7-6 |
| 2018 |
Guayaquil
|
Quarter Finals | Guido Andreozzi |
4-6
2-6 |
| 2018 |
Guayaquil
|
1/8 | Guido Andreozzi |
3-6
2-6 |
| 2018 |
Guayaquil
|
1/16 | Guido Andreozzi |
6-7
2-6 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2018 |
Tianjin Open
|
Quarter Finals | Caroline Garcia |
2-6
0-1 |
| 2018 |
Tianjin Open
|
1/8 | Petra Martic |
1-6
6-0 6-1 |
| 2018 |
Tianjin Open
|
1/16 | Petra Martic |
3-6
6-3 7-6 |
| 2018 |
China Open
|
1/16 | Caroline Wozniacki |
5-7
3-6 |
| 2018 |
China Open
|
1/32 | Petra Martic |
6-2
6-3 |
| 2018 |
Coupe Banque Nationale
|
Quarter Finals | Jessica Pegula |
6-3
7-5 |
| 2018 |
Coupe Banque Nationale
|
1/8 | Petra Martic |
0-6
2-6 |
| 2018 |
Coupe Banque Nationale
|
1/16 | Petra Martic |
1-6
1-6 |
