The German switched coaches three times in 2019.
| year | Event | RND | Winner | Results |
|---|---|---|---|---|
| 2020 |
THIEMs7, Final Stage
|
Championship | Matteo Berrettini |
4-6
2-6 |
| 2020 |
THIEMs7, Final Stage
|
Semi Finals | Dominic Thiem |
6-7
6-2 6-2 |
| 2020 |
THIEMs7, Soccercoin Group
|
Championship | Roberto Bautista Agut |
6-0
6-1 |
| 2020 |
THIEMs7, Soccercoin Group
|
Championship | Matteo Berrettini |
6-4
6-3 |
| 2020 |
THIEMs7, Soccercoin Group
|
Championship | Roberto Bautista Agut |
4-6
3-6 |
| 2020 |
Region of Valencia
|
Championship | Roberto Bautista Agut |
1-6
1-6 |
| 2020 |
Region of Valencia
|
Championship | Roberto Bautista Agut |
4-6
4-6 |
| 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 |
