Davis Cup WG2 R1: THA vs DEN 2021 ATP
Round robin
| Winner | Loser | Score | |
|---|---|---|---|
| Christian Sigsgaard | d. | Wishaya Trongcharoenchaikul | 6-3 6-2 |
| August Holmgren | d. | Kasidit Samrej | 3-6 7-5 6-2 |
| August Holmgren | d. | Wishaya Trongcharoenchaikul | 6-4 6-4 |
| Kasidit Samrej | d. | Johannes Ingildsen | 7-5 6-3 |