| German Premier League | 2020/07/28 11:50 | Simon, Tobias v Fomba, Luc | 7-6,6-2 |
| German Premier League | 2020/07/27 13:00 | Simon, Tobias v Alexey Vatutin | 6-7,6-3,2-6 |
| DTB German Pro Series | 2020/06/11 09:30 | Max Hans Rehberg v Simon, Tobias | 3-6,7-6,6-3 |
| DTB German Pro Series | 2020/06/10 14:35 | Yannick Hanfmann v Simon, Tobias | 6-3,6-2 |
| DTB German Pro Series | 2020/06/09 11:00 | Bachinger, Matthias v Simon, Tobias | 4-6,6-7 |
| Challenger Potchefstroom | 2020/03/11 09:30 | Moundir, Adam v Simon, Tobias | 5-7,3-6 |
| Potchefstroom, Singles Qualifying M-ITF-RSA-01A | 2020/03/08 08:00 | Benjamin Bonzi v Simon, Tobias | 7-6,6-4 |
| Potchefstroom, Singles Qualifying M-ITF-RSA-01A | 2020/03/07 10:00 | Doumbia, Sadio v Simon, Tobias | 6-7,3-6 |
| German Premier League | 2020/07/27 17:05 | Paul Valsecchi v Willems, Johann | 1-6,7-5,6-2 |
| ITF - M15 Monastir | 2020/03/09 13:30 | Willems, Johann v Dahiya, Paras | 3-6,6-2,6-10 |
| ITF - M15 Monastir | 2020/03/09 08:00 | Willems, Johann v Lewie Lane | 6-4,6-4 |
| ITF - M15 Monastir | 2020/03/08 08:00 | Adil Kalyanpur v Willems, Johann | 2-6,2-6 |
| Challenger - Koblenz | 2020/02/17 09:00 | Lucas Gerch v Willems, Johann | 6-1,6-7,6-1 |
| ITF - M25 Nussloch | 2020/01/20 09:00 | Stanek, Robin v Willems, Johann | 7-5,6-0 |
| ITF - M25 Nussloch | 2020/01/19 09:00 | Peters, Flemming v Willems, Johann | 2-6,0-6 |
| Bad Salzdetfurth, Simples M-ITF-GER-14A | 2019/10/08 11:00 | Schifris, Jeremy v Willems, Johann | 3-6,6-3,10-3 |