Stadium: Lotto RLP Court Round: 166 Ground: Hardcourt indoor
| ITF M15 East Lansing | 2019/11/23 21:45 | Lucas Gerch v Daniel Altmaier | 1-6,6-7 |
| ITF M15 East Lansing | 2019/11/22 17:00 | Strong Kirchheimer v Lucas Gerch | 5-7,3-6 |
| ITF M15 East Lansing | 2019/11/21 18:45 | Tanner K Smith v Lucas Gerch | 4-6,0-6 |
| ITF M15 East Lansing | 2019/11/20 19:55 | Grey Hamilton v Lucas Gerch | 4-6,2-6 |
| Challenger Champaign | 2019/11/12 23:55 | Lucas Gerch v Emilio Gomez | 4-6,7-6,2-6 |
| Challenger Champaign | 2019/11/11 19:55 | Lucas Gerch v Gijs Brouwer | 7-6,6-2 |
| ITF M25 Malibu | 2019/11/07 17:20 | Alexander Sarkissian v Lucas Gerch | 6-4,7-6 |
| ITF M25 Malibu | 2019/11/06 19:35 | Gabriel Diallo v Lucas Gerch | 6-4,6-7,6-7 |
| ITF M15 Bad Salzdetfurth | 2019/10/08 11:00 | Jeremy Schifris v Johann Willems | 3-6,6-3,10-3 |
| ITF M15 Bad Salzdetfurth | 2019/10/07 09:10 | Johann Willems v Laurin Aerne | 6-3,6-3 |
| ITF Germany F16 | 2018/10/23 13:00 | Stefan Seifert v Johann Willems | 4-6,6-3,6-2 |
| ITF Germany F16 | 2018/10/22 10:00 | Johann Willems v Karlo Cubelic | 6-3,6-4 |
| ITF Germany F16 | 2018/10/21 10:30 | Johann Willems v Herman Meeuwes Mattheo Knoop | 6-4,6-3 |
| ITF Germany F5 | 2018/06/28 14:15 | Markus Eriksson v Johann Willems | 6-3,6-0 |
| ITF Germany F5 | 2018/06/26 15:20 | Gibril Diarra v Johann Willems | 1-6,2-6 |
| ITF Romania F1 | 2018/05/22 07:00 | Matthias Haim v Johann Willems | 7-6,7-6 |