Kvitova and Muguruza were playing in Charleston for the first time since 2018 and 2013.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2021 |
Volvo Car Open
|
1/8 | Danka Kovinic |
6-4
6-1 |
| 2021 |
Volvo Car Open
|
1/16 | Petra Kvitova |
6-7
2-6 |
| 2021 |
Miami Open
|
1/8 | Elina Svitolina |
6-2
5-7 5-7 |
| 2021 |
Miami Open
|
1/16 | Petra Kvitova |
6-1
6-2 |
| 2021 |
Miami Open
|
1/32 | Petra Kvitova |
6-0
6-4 |
| 2021 |
Dubai Duty Free Tennis Championships
|
1/16 | Jil Teichmann |
2-6
4-3 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2021 |
Monte Carlo Masters
|
1/32 | Grigor Dimitrov |
6-3
6-4 |
| 2021 |
Sardegna Open
|
Quarter Finals | Nikoloz Basilashvili |
7-5
4-6 6-3 |
| 2021 |
Sardegna Open
|
1/8 | Jan-Lennard Struff |
4-6
2-6 |
| 2021 |
Sardegna Open
|
1/16 | Jan-Lennard Struff |
6-1
1-6 5-7 |
| 2021 |
Miami Open
|
1/16 | Roberto Bautista Agut |
6-4
3-6 2-6 |
| 2021 |
Miami Open
|
1/32 | Jan-Lennard Struff |
6-3
6-4 |
