Isner lost his fourth-round match to Roberto Bautista Agut in Miami on Tuesday.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2017 |
US Open WTA
|
1/64 | Petra Kvitova |
7-5
7-5 |
| 2017 |
Citi Open
|
1/16 | Oceane Dodin |
6-4
3-6 0-2 |
| 2017 |
NanChang Open
|
1/8 | Jing-Jing Lu |
2-6
6-1 6-2 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2021 |
Miami Open
|
1/64 | Yen-Hsun Lu |
3-6
4-6 |
| 2021 |
Australian Open ATP
|
1/64 | Lorenzo Sonego |
5-7
4-6 4-6 |
| 2021 |
Great Ocean Road Open
|
1/16 | Stefano Travaglia |
7-6
3-6 4-6 |
| 2021 |
Great Ocean Road Open
|
1/32 | Sam Querrey |
4-6
7-6 6-0 |
