Stadium: Center Court Round: 14 Ground: Hardcourt outdoor
| Challenger Helsinky | 2021/11/14 09:00 | Johannes Haerteis v Viktor Durasovic | 4-6,6-7 |
| Challenger Eckental | 2021/11/02 18:15 | Maxime Cressy v Johannes Haerteis | 6-7,6-4,6-3 |
| Challenger Eckental | 2021/11/01 11:15 | Johannes Haerteis v Uladzimir Ignatik | 4-6,6-2,7-6 |
| Challenger Eckental | 2021/10/31 13:30 | Lucas Miedler v Johannes Haerteis | 3-6,7-5,3-6 |
| Challenger Ismaning | 2021/10/25 11:50 | Otto Virtanen v Johannes Haerteis | 4-6,6-3,6-3 |
| Challenger Ismaning | 2021/10/24 12:35 | Johannes Haerteis v Tristan Lamasine | 6-4,6-4 |
| ITF M25 Hamburk | 2021/10/23 10:00 | Henri Squire v Johannes Haerteis | 6-4,6-4 |
| ITF M25 Hamburk | 2021/10/22 12:10 | Johannes Haerteis v Daniel Little | 6-4,6-4 |
| Challenger Charlottesville Qual | 2017/10/29 19:25 | Jared Hiltzik v Ammar Faleh Alhogbani | 1-6,6-1,6-3 |
| Davis Cup | 2017/04/05 08:10 | Ammar Faleh Alhogbani v Evgeniy Babak | 6-2,4-6,6-4 |
| Davis Cup | 2017/04/03 09:10 | Yusuf Qaed v Ammar Faleh Alhogbani | 0-6,2-6 |
| Challenger Charlottesville Qual | 2016/10/29 16:00 | Ammar Faleh Alhogbani v Jarryd Chaplin | 6-7,4-6 |