Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Decatur | 2021/08/02 15:00 | Naoki Nakagawa v Eliot Spizzirri | 6-7,1-6 |
| ITF M25 Champaign | 2021/07/31 16:50 | Gijs Brouwer v Naoki Nakagawa | 6-1,4-6,6-1 |
| ITF M25 Champaign | 2021/07/30 17:40 | Joshua Peck v Naoki Nakagawa | 3-6,1-6 |
| ITF M25 Champaign | 2021/07/29 19:05 | Naoki Nakagawa v Yusuke Takahashi | 6-3,6-4 |
| ITF M25 Champaign | 2021/07/28 21:45 | Naoki Nakagawa v Nathan Ponwith | 4-6,7-5,6-2 |
| ITF M15 Monastir | 2021/06/01 09:00 | Naoki Nakagawa v Jeremy Beale | 4-6,7-6,4-6 |
| ITF M15 Monastir | 2021/05/29 08:30 | Eliakim Coulibaly v Naoki Nakagawa | 6-4,4-6,7-5 |
| ITF M15 Monastir | 2021/05/28 09:30 | Naoki Nakagawa v Santiago Rodriguez Taverna | 6-3,6-7,6-1 |
| ITF M25 Loule | 2021/10/14 13:55 | Petros Chrysochos v Maximilian Neuchrist | 6-4,3-6,5-7 |
| ITF M25 Loule | 2021/10/13 14:20 | Petros Chrysochos v Pawel Juszczak | 7-5,6-3 |
| ITF M25 Setubal | 2021/10/08 10:30 | Rinky Hijikata v Petros Chrysochos | 6-3,6-2 |
| ITF M25 Setubal | 2021/10/07 14:35 | Henrique Rocha v Petros Chrysochos | 7-6,4-6,3-6 |
| Challenger Como | 2021/08/31 09:05 | Federico Gaio v Petros Chrysochos | 6-1,3-6,6-3 |
| Challenger Como | 2021/08/30 09:00 | Petros Chrysochos v Alexey Vatutin | 1-6,6-3,6-4 |
| Challenger Como | 2021/08/29 10:00 | Alexander Ritschard v Petros Chrysochos | 6-3,4-6,5-7 |
| Challenger Barletta | 2021/08/23 13:15 | Thiago Agustin Tirante v Petros Chrysochos | 6-1,4-6,6-2 |