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
|
Semi Finals | Serena Williams |
6-3
6-0 |
| 2018 |
US Open WTA
|
Quarter Finals | Anastasija Sevastova |
2-6
3-6 |
| 2018 |
US Open WTA
|
1/8 | Anastasija Sevastova |
6-3
1-6 6-0 |
| 2018 |
US Open WTA
|
1/16 | Anastasija Sevastova |
6-4
1-6 2-6 |
| 2018 |
US Open WTA
|
1/64 | Anastasija Sevastova |
2-6
6-2 3-6 |
| 2018 |
Western & Southern Open
|
1/32 | Camila Giorgi |
2-6
3-6 |
| 2018 |
Rogers Cup
|
Quarter Finals | Sloane Stephens |
2-6
2-6 |
| 2018 |
Rogers Cup
|
1/8 | Anastasija Sevastova |
6-3
7-6 |
| 2018 |
Rogers Cup
|
1/16 | Anastasija Sevastova |
6-4
6-7 1-6 |
| 2018 |
Rogers Cup
|
1/32 | Anastasija Sevastova |
1-6
0-6 |
