Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| Challenger Sibiu | 2020/09/23 11:50 | Shuichi Sekiguchi v Felipe Meligeni Rodrigues Alves | 2-6,3-6 |
| Challenger Sibiu | 2020/09/22 08:00 | Shuichi Sekiguchi v Dragos Dima | 7-5,7-6 |
| ITF M25 Nonthaburi | 2020/01/31 05:00 | Matija Pecotic v Shuichi Sekiguchi | 6-2,7-5 |
| ITF M25 Nonthaburi | 2020/01/30 07:05 | Jung-Woong Na v Shuichi Sekiguchi | 1-6,4-6 |
| ITF M25 Nonthaburi | 2020/01/29 07:25 | Kasidit Samrej v Shuichi Sekiguchi | 3-6,2-6 |
| Challenger Bangkok 2 | 2020/01/22 05:25 | Peter Polansky v Shuichi Sekiguchi | 6-3,7-5 |
| ATP Auckland | 2020/01/10 22:00 | Shuichi Sekiguchi v Tatsuma Ito | 3-6,6-4,4-6 |
| ITF M15 Te Anau | 2020/01/04 00:30 | Luke Saville v Shuichi Sekiguchi | 6-3,6-3 |
| Challenger Forli | 2020/09/19 08:00 | Christian Harrison v Sadio Doumbia | 6-1,6-4 |
| ITF M15 Caslano | 2020/09/03 16:55 | Remy Bertola v Sadio Doumbia | 3-6,6-1,6-3 |
| ITF M15 Caslano | 2020/09/02 16:50 | Lucas Gerch v Sadio Doumbia | 4-6,1-6 |
| ITF M15 Anif | 2020/08/28 10:00 | Peter Heller v Sadio Doumbia | 6-3,6-2 |
| ITF M15 Anif | 2020/08/27 14:25 | Karlis Ozolins v Sadio Doumbia | 2-6,4-6 |
| ITF M15 Anif | 2020/08/26 11:40 | Sebastian Fanselow v Sadio Doumbia | 2-6,2-6 |
| ITF M25 Vogau | 2020/08/20 09:25 | Sadio Doumbia v Mathias Bourgue | 5-7,2-6 |
| ITF M25 Vogau | 2020/08/19 08:00 | Sadio Doumbia v Simon Beaupain | 7-6,6-2 |