Stadium: Center Court Round: 14 Ground: Hardcourt outdoor
| ITF M15 Castelo Branco | 2021/07/26 14:00 | Pietro Mugelli v David Marrero | 7-6,7-6 |
| ITF M15 Castelo Branco | 2021/07/25 11:00 | David Marrero v Mario G Fernandez | 4-6,7-5,10-8 |
| ITF M15 Loule | 2020/03/09 13:00 | Gabriele Moghini v David Marrero | 6-3,6-2 |
| ITF M15 Loule | 2020/03/08 10:00 | David Marrero v Goncalo Falcao | 7-5,6-3 |
| ITF M15 Santo Domingo | 2019/12/01 14:00 | David Marrero v Michel-Alexandre Fortin | 6-4,6-4 |
| Challenger Szczecin Qual | 2017/09/10 10:05 | David Marrero v Maxime Tabatruong | 0-6,4-6 |
| ATP Barcelona Qual | 2015/04/18 13:20 | Norbert Gombos v David Marrero | 7-5,6-1 |
| Challenger Biel | 2022/03/20 12:35 | Johannes Haerteis v Michail Pervolarakis | 3-6,2-6 |
| ITF M25 Trimbach | 2022/03/19 13:50 | Leandro Riedi v Johannes Haerteis | 6-4,6-4 |
| ITF M25 Trimbach | 2022/03/18 12:15 | Otto Virtanen v Johannes Haerteis | 4-6,6-4,4-6 |
| ITF M25 Trimbach | 2022/03/17 09:00 | Johannes Haerteis v Constantin Frantzen | 6-3,6-7,6-2 |
| ITF M25 Trimbach | 2022/03/16 09:00 | Gabriele Moghini v Johannes Haerteis | 5-7,4-6 |
| ITF M15 Villena | 2022/02/05 09:30 | Nikolas Sanchez Izquierdo v Johannes Haerteis | 6-3,4-6,6-2 |
| ITF M15 Villena | 2022/02/04 12:10 | Johannes Haerteis v Thomas Deschamps | 6-4,7-6 |
| ITF M15 Villena | 2022/02/03 11:15 | Johannes Haerteis v Alejandro Manzanera Pertusa | 3-6,6-0,6-2 |