Stadium: Court 1 Round: 44 Ground: Hardcourt outdoor
| ITF M25 Chiang Rai | 2022/06/07 03:55 | Pawit Sornlaksup v Guntinun Sootinun-Opart | 6-2,6-3 |
| ITF M25 Chiang Rai Qual | 2022/06/05 02:00 | Patorn Hanchaikul v Guntinun Sootinun-Opart | 4-6,6-2,7-10 |
| ITF M25 Chiang Rai | 2022/06/01 06:00 | Guntinun Sootinun-Opart v Kasidit Samrej | 2-6,5-7 |
| ITF M25 Chiang Rai | 2022/05/31 04:15 | Arjun Mehrotra v Guntinun Sootinun-Opart | 4-6,6-3,8-10 |
| ITF M25 Chiang Rai | 2022/05/30 04:25 | Panathon Sooksod v Guntinun Sootinun-Opart | 2-6,2-6 |
| ITF M15 Chiang Rai | 2022/04/12 02:00 | Guntinun Sootinun-Opart v Taisei Ichikawa | 5-7,0-6 |
| ITF M15 Chiang Rai | 2022/04/11 03:50 | Maxence Broville v Guntinun Sootinun-Opart | 2-6,6-3,4-10 |
| ITF M15 Chiang Rai Qual | 2022/04/10 03:00 | Teerapat Khantiweerawat v Guntinun Sootinun-Opart | 3-6,1-6 |