Stadium: R C Darling Stadium Round: 54 Ground: Hardcourt outdoor
| ITF M15 Sao Paulo | 2019/10/14 14:00 | Lucas Gessner v Joao Pedro Okano | 6-1,1-6,10-12 |
| ITF M25 Rio de Janeiro | 2019/10/07 14:00 | Lucas Gessner v Pedro Iamachkine | 1-6,1-6 |
| ITF M15 Santiago | 2019/09/30 12:00 | Nicolas Bianchi v Lucas Gessner | 6-2,6-0 |
| ITF M15 Buenos Aires | 2019/09/15 14:00 | Nicolas Uryson v Lucas Gessner | 6-2,6-4 |
| ITF M15 Curitiba | 2019/06/24 15:55 | Lucas Gessner v Charles Force | 6-0,5-7,9-11 |
| ITF M15 Sao JDR Preto | 2019/06/17 16:00 | Andre Miele v Lucas Gessner | 6-2,6-2 |
| ITF M15 Cancun | 2019/06/10 19:00 | Mwendwa Mbithi v Lucas Gessner | 6-2,6-2 |
| ITF M15 Cancun | 2019/06/10 14:30 | Lucas Gessner v Wulfrano M M Esdras | 6-4,6-3 |
| ITF M15 East Lansing | 2019/11/21 17:00 | Alex Kobelt v Daniel Altmaier | 2-6,4-6 |
| ITF M15 East Lansing | 2019/11/19 15:00 | Enzo Wallart v Alex Kobelt | 7-6,6-7,8-10 |
| ITF M15 East Lansing | 2019/11/18 16:00 | Alex Kobelt v Abraham Asaba | 6-4,7-6 |
| Challenger Las Vegas | 2019/10/15 19:30 | Michail Pervolarakis v Alex Kobelt | 6-1,6-3 |
| ITF M15 Champaign | 2019/06/05 18:30 | Herbert Jody Maginley v Alex Kobelt | 7-6,7-5 |
| ITF M15 Champaign | 2019/06/04 15:00 | Alex Kobelt v Bradley Frye | 6-4,6-4 |
| ITF M15 Champaign | 2019/06/03 15:00 | Alex Kobelt v Nevin Arimilli | 6-4,6-4 |
| Challenger Columbus | 2019/01/07 15:00 | Joao Menezes v Alex Kobelt | 7-5,4-6,7-5 |