The former No. 3 has a big-name coach in his corner with few points to defend this season.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2019 |
Delray Beach Open
|
1/16 | Daniel Evans |
3-6
7-6 7-5 |
| 2019 |
New York Open
|
1/8 | Jason Jung |
6-3
7-5 |
| 2019 |
Australian Open ATP
|
Quarter Finals | Rafael Nadal |
3-6
4-6 2-6 |
| 2019 |
Australian Open ATP
|
1/8 | Frances Tiafoe |
7-5
7-6 6-7 7-5 |
| 2019 |
Australian Open ATP
|
1/16 | Frances Tiafoe |
6-7
6-3 4-6 6-4 6-3 |
| 2019 |
Australian Open ATP
|
1/32 | Frances Tiafoe |
6-4
4-6 4-6 5-7 |
| 2019 |
Australian Open ATP
|
1/64 | Frances Tiafoe |
7-6
6-3 6-3 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2019 |
Dubai Duty Free Tennis Championships
|
1/16 | Garbine Muguruza |
7-5
6-2 |
| 2019 |
Dubai Duty Free Tennis Championships
|
1/32 | Saisai Zheng |
2-6
6-4 5-7 |
| 2019 |
Fed Cup Group 1 - Asia/Oceania Playoff
|
Championship | Zarina Diyas |
3-6
2-6 |
| 2019 |
Fed Cup Group 1 - Asia/Oceania Pool B
|
Championship | Saisai Zheng |
3-6
6-3 6-3 |
