The German switched coaches three times in 2019.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2010 |
Wimbledon
England, Wimbledon |
Championship | David Ferrer |
4-6
2-6 3-6 |
| 2010 |
Gerry Weber Open
Germany, Halle |
Championship | Andreas Beck |
6-2
3-6 7-6 |
| 2010 |
Gerry Weber Open
Germany, Halle |
Championship | Nicolas Kiefer |
4-6
6-1 7-5 |
| 2010 |
Mutua Madrilena Masters Madrid, Qualification
|
Championship | Filippo Volandri |
4-6
2-6 |
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2020 |
Qatar Total Open
|
1/32 | Maria Sakkari |
6-4
6-3 |
| 2020 |
Dubai Duty Free Tennis Championships, Qualification
|
1/12 (Special Qual) | Sorana Cirstea |
7-5
4-6 6-7 |
| 2020 |
Dubai Duty Free Tennis Championships, Qualification
|
1/24 (Special Qual) | Julia Goerges |
6-2
6-4 |
