Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| Chengdu, China | 2019/07/31 02:00 | Thomas Fancutt v Xia, Zihao | 7-6,6-4 |
| Kunshan, Simples M-ITF-CHN-12A | 2019/07/03 01:30 | Li, Yuanfeng v Xia, Zihao | 2-6,6-2,6-3 |
| Hengyang, Simples M-ITF-CHN-10A | 2019/06/19 06:55 | Xia, Zihao v Chiu, Yu Hsiang | 6-0,6-2 |
| Luzhou, Simples M-ITF-CHN-07A | 2019/06/01 03:05 | Xia, Zihao v He, Yecong | 6-7,1-6 |
| Luzhou, Simples M-ITF-CHN-07A | 2019/05/31 02:00 | Xia, Zihao v Zheng, Weiqiang | 6-7,6-2,6-4 |
| Luzhou, Simples M-ITF-CHN-07A | 2019/05/30 03:50 | Xia, Zihao v Li, Yuanfeng | 6-4,6-4 |
| Luzhou, Simples M-ITF-CHN-07A | 2019/05/28 07:45 | Xia, Zihao v Wang, Ruixuan | 6-2,6-2 |
| Challenger - Gwangju | 2019/05/14 02:00 | Xia, Zihao v Filip Peliwo | 4-6,4-6 |
| Jakarta, Singles Main, M-ITF-INA-02A | 2019/08/06 02:30 | Saito, Takashi v Yeung, Pak Long | 7-6,7-6 |
| Jakarta, Singles Main, M-ITF-INA-02A | 2019/08/05 03:00 | Saito, Takashi v Sekhar, S Prithvi | 6-0,6-2 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/31 02:30 | Rio Noguchi v Saito, Takashi | 6-2,7-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/30 02:30 | Saito, Takashi v Kumthonkittikul, W. | 6-2,6-4 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/29 02:30 | Saito, Takashi v Jirapoomdaje, Pawin | 6-2,6-1 |
| ITF M25 Martos | 2019/06/18 14:30 | Echazu, Mauricio v Saito, Takashi | 7-6,4-6,2-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/04 09:00 | Saito, Takashi v Toby Martin | 1-6,1-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/05/29 11:30 | Louis Tessa v Saito, Takashi | 6-0,6-4 |