Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| Challenger Chengdu | 2019/07/31 07:00 | Goncalo Oliveira v Arjun Kadhe | 7-6,6-3 |
| Challenger Tampere | 2019/07/24 07:30 | Jeroen Vanneste v Goncalo Oliveira | 6-3,7-6 |
| Challenger Nur-Sultan | 2019/07/18 05:00 | Yunseong Chung v Goncalo Oliveira | 6-7,7-5,6-4 |
| Challenger Nur-Sultan | 2019/07/16 10:40 | Nam Hoang Ly v Goncalo Oliveira | 4-6,4-6 |
| Challenger Perugia | 2019/07/09 15:20 | Goncalo Oliveira v Giulio Zeppieri | 6-7,6-7 |
| Challenger Recanati | 2019/07/01 09:55 | Goncalo Oliveira v Raul Brancaccio | 3-6,4-6 |
| ATP Antalya | 2019/06/23 10:30 | Goncalo Oliveira v Kevin Krawietz | 4-6,6-3,6-7 |
| ATP Antalya | 2019/06/22 10:00 | Goncalo Oliveira v Luke Saville | 6-3,6-4 |
| Challenger Chengdu | 2019/07/31 08:55 | Shuichi Sekiguchi v Tsung-Hua Yang | 6-4,6-4 |
| Challenger Chengdu | 2019/07/29 10:30 | Weiqiang Zheng v Shuichi Sekiguchi | 5-7,1-6 |
| Challenger Nur-Sultan | 2019/07/18 05:00 | Egor Gerasimov v Shuichi Sekiguchi | 6-2,6-0 |
| Challenger Nur-Sultan | 2019/07/16 05:00 | Shuichi Sekiguchi v Zhizhen Zhang | 7-5,6-4 |
| Challenger Nur-Sultan | 2019/07/15 06:45 | Shuichi Sekiguchi v Dostanbek Tashbulatov | 6-3,6-1 |
| Challenger Fergana | 2019/06/17 07:25 | Shuichi Sekiguchi v Makoto Ochi | 6-4,6-4 |
| ITF M25 Hongkong | 2019/06/09 04:00 | Shintaro Imai v Shuichi Sekiguchi | 6-2,6-1 |
| ITF M25 Hongkong | 2019/06/08 03:00 | Yuki Mochizuki v Shuichi Sekiguchi | 3-6,6-7 |