Stadium: Court 4 Round: 25
| Challenger Hua Hin Qual | 2017/11/18 03:00 | Ryota Tanuma v Phongsapak Kerdlaphee | 6-4,6-4 |
| ITF Vietnam F2 | 2018/05/05 07:00 | Ji Sung Nam v Phongsapak Kerdlaphee | 6-2,6-1 |
| ITF Vietnam F1 | 2018/04/28 05:00 | Stefan Skadarka v Phongsapak Kerdlaphee | 2-6,6-2,6-3 |
| ITF Turkey F15 | 2018/04/14 09:30 | Karlo Kranic v Phongsapak Kerdlaphee | 1-6,6-1,6-2 |
| ITF Turkey F14 | 2018/04/07 09:30 | Christian Oliveira v Phongsapak Kerdlaphee | 6-0,6-1 |
| ITF Turkey F13 | 2018/03/31 08:30 | Ken Onishi v Phongsapak Kerdlaphee | 6-4,6-2 |
| ITF Egypt F9 | 2018/03/11 08:00 | Phongsapak Kerdlaphee v Siphosothando Montsi | 2-6,4-6 |
| ITF Egypt F8 | 2018/03/03 12:30 | Phongsapak Kerdlaphee v Stephan Gerritsen | 1-6,4-6 |
| ITF Egypt F7 | 2018/02/24 08:00 | Wilfredo Gonzalez v Phongsapak Kerdlaphee | 6-2,6-3 |
| ITF Vietnam F2 | 2018/05/11 03:00 | Gengo Kikuchi v Ryota Tanuma | 6-4,6-2 |
| ITF Vietnam F2 | 2018/05/09 03:00 | Linh Giang Trinh v Ryota Tanuma | 6-3,3-6,5-7 |
| ITF Vietnam F2 | 2018/05/07 05:15 | Adrian Andrzejczuk v Ryota Tanuma | 4-6,1-6 |
| ITF Vietnam F1 | 2018/05/02 05:25 | Ryota Tanuma v Lucas Vuradin | 6-7,2-6 |
| ITF Vietnam F1 | 2018/05/01 03:00 | Ryota Tanuma v Chun Hun Wong | 3-6,7-6,6-1 |
| ITF Japan F6 | 2018/04/10 04:45 | Shota Iino v Ryota Tanuma | 2-6,2-6 |
| ITF Japan F5 | 2018/04/06 01:00 | Ryota Tanuma v Makoto Ochi | 6-2,3-6,6-7 |
| ITF Japan F5 | 2018/04/04 05:35 | Yuta Kawahashi v Ryota Tanuma | 6-3,1-6,4-6 |