Spain was without world No. 1 Rafael Nadal, who was ruled out due to knee injury.
| year | Event | RND | Winner | Results |
|---|
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2018 |
US Open WTA
|
Quarter Finals | Madison Keys |
4-6
3-6 |
| 2018 |
US Open WTA
|
1/8 | Carla Suarez Navarro |
6-4
6-3 |
| 2018 |
US Open WTA
|
1/16 | Carla Suarez Navarro |
7-5
4-6 6-7 |
| 2018 |
US Open WTA
|
1/32 | Carla Suarez Navarro |
1-6
6-4 4-6 |
| 2018 |
US Open WTA
|
1/64 | Carla Suarez Navarro |
7-5
3-6 4-6 |
| 2018 |
Connecticut Open
|
Final | Aryna Sabalenka |
6-1
6-4 |
| 2018 |
Connecticut Open
|
Semi Finals | Carla Suarez Navarro |
4-4
|
| 2018 |
Connecticut Open
|
Quarter Finals | Carla Suarez Navarro |
6-3
0-0 |
| 2018 |
Connecticut Open
|
1/8 | Carla Suarez Navarro | |
| 2018 |
Connecticut Open
|
1/16 | Carla Suarez Navarro |
6-7
4-6 |
