Stadium: Gencom Round: 14 Ground: Hardcourt indoor
| Challenger Luedenscheid | 2021/08/17 08:00 | Julian Lenz v Shintaro Mochizuki | 5-7,7-5,6-2 |
| Challenger Helsinki | 2021/11/18 11:30 | Alex Molcan v Shintaro Mochizuki | 6-3,6-2 |
| Challenger Helsinki | 2021/11/15 13:45 | Alibek Kachmazov v Shintaro Mochizuki | 5-7,7-6,6-7 |
| Challenger Helsinki | 2021/11/14 10:20 | Kristjan Tamm v Shintaro Mochizuki | 6-7,3-6 |
| Challenger Bratislava | 2021/11/10 09:00 | Shintaro Mochizuki v Kacper Zuk | 6-7,3-6 |
| Challenger Bratislava | 2021/11/08 10:50 | Zsombor Piros v Shintaro Mochizuki | 6-3,6-2 |
| Challenger Bratislava | 2021/11/07 13:05 | Peter Nad v Shintaro Mochizuki | 3-6,4-6 |
| Challenger Eckental | 2021/10/31 09:00 | Henri Squire v Shintaro Mochizuki | 6-4,6-2 |
| Challenger Las Vegas | 2021/10/26 21:15 | Shintaro Mochizuki v Jeffrey John Wolf | 3-6,5-7 |
| Challenger Forli | 2022/01/05 13:15 | Julian Lenz v Cedrik-Marcel Stebe | 2-6,6-7 |
| Challenger Forli | 2022/01/03 18:20 | Julian Lenz v Yu Hsiou Hsu | 6-4,6-4 |
| Challenger Forli | 2021/12/06 13:00 | Gijs Brouwer v Julian Lenz | 6-2,6-3 |
| Challenger Forli | 2021/12/03 15:30 | Julian Lenz v Maxime Cressy | 3-6,4-6 |
| Challenger Forli | 2021/12/01 16:35 | Julian Lenz v Dominic Stephan Stricker | 7-5,7-5 |
| Challenger Forli | 2021/11/30 13:10 | Federico Gaio v Julian Lenz | 0-6,3-6 |
| Challenger Bari | 2021/11/25 13:20 | Julian Lenz v Luca Nardi | 3-6,2-6 |
| Challenger Bari | 2021/11/23 09:00 | Julian Lenz v Tim Van Rijthoven | 7-5,5-7,6-4 |