The 27-year-old Austrian has not played since his Dubai opening-round defeat.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2019 |
Mexican Open
|
1/8 | John Isner |
6-4
6-4 |
| 2018 |
Western & Southern Open
|
1/32 | Sam Querrey |
4-6
7-6 6-7 |
| 2016 |
Heineken Open
|
1/8 | John Isner |
6-7
7-6 4-6 |
| 2015 |
Western & Southern Open
|
1/32 | Sam Querrey |
3-6
6-7 |
| 2015 |
Memphis Open
|
Quarter Finals | Sam Querrey |
6-7
6-7 |
| 2010 |
Serbia Open
Serbia, Belgrade |
Championship | Sam Querrey |
3-6
7-6 6-4 |
| 2010 |
BNP Paribas Open
United States, California, Indian Wells |
Championship | John Isner |
7-6
6-4 |
| 2010 |
R. M. Keegan Championships
|
Championship | Sam Querrey |
6-7
7-6 6-3 |
| 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 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2021 |
Miami Open
|
1/8 | Roberto Bautista Agut |
3-6
6-4 6-7 |
| 2021 |
Miami Open
|
1/16 | John Isner |
6-7
6-7 |
| 2021 |
Miami Open
|
1/32 | John Isner |
6-2
3-6 5-7 |
| 2021 |
Mexican Open
|
1/8 | Stefanos Tsitsipas |
6-3
6-2 |
| 2021 |
Mexican Open
|
1/16 | John Isner |
6-4
6-3 |
| 2021 |
Delray Beach Open
|
Quarter Finals | Sebastian Korda |
6-3
4-6 6-3 |
| 2021 |
Delray Beach Open
|
1/8 | John Isner |
4-6
6-7 |
