Round: 44 Ground: Hardcourt outdoor
| ITF - M25 - Las Vegas | 2020/03/02 18:00 | Lucas Gessner v Alex Kobelt | 6-7,2-6 |
| ITF - M15 - São 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 - Te Anau | 2019/12/31 05:15 | Sam Ryan Ziegann v Shuichi Sekiguchi | 2-6,3-6 |
| ITF - M25 - Toowoomba | 2019/10/05 23:30 | Nicholas Horton v Sam Ryan Ziegann | 7-6,0-6,14-12 |
| ITF - M25 - Brisbane | 2019/09/29 02:00 | Sam Ryan Ziegann v Nicholas Horton | 2-6,4-6 |
| ITF - M15 - Cancun | 2019/09/09 15:00 | Sam Ryan Ziegann v Ryotaro Matsumura | 2-6,3-6 |
| ITF - M15 - Cancun | 2019/08/26 14:30 | Jiaxi Ma v Sam Ryan Ziegann | 6-2,2-6,10-2 |
| ITF - M15 - Cancun | 2019/08/19 14:30 | Jiaxi Ma v Sam Ryan Ziegann | 3-6,6-3,10-6 |
| ITF - M15 - Anseong | 2019/06/25 01:00 | Hayeon Seong v Sam Ryan Ziegann | 7-5,6-1 |
| ITF - M15 - Anseong | 2019/06/24 01:00 | Per Nordstrom v Sam Ryan Ziegann | 3-6,2-6 |