Tournament Name: เทนนิสเยาวชนเพื่อความชนะเลิศ แห่งประเทศไทย ครั้งที่ ๕๙ ประจำปี ๒๕๖๔, Week Of: 04-October-2021
| S.No. | First Name | Family Name | Province |
| 1 | Thanut | KARUAMPHO | SKA |
| S.No. | First Name | Family Name | Province |
| 1 | Taisiya | KOROTCHENKO | Russian Federation* |
| S.No. | First Name | Family Name | Province |
| 1 | Sirasit | CHUABANDIT | YST |
| 2 | Tacit | SANGAROON | BKK |
| 3 | Nutt | CHANSONTIKUL | BKK |
| S.No. | First Name | Family Name | Province |
| 1 | Hanifah | SONN | France* |
| S.No. | First Name | Family Name | Province |
| 1 | Pakpoom | KANDSANGSUYONG | YLA |
| 2 | Nutt | POKVANVITH | SPB |
| 3 | Natthakrit | POLPAISAL | NBI |
| S.No. | First Name | Family Name | Province |
| 1 | Thanakrit | SANGAROON | BKK |
| 2 | Chayaphol | SANGAROON | BKK |
| S.No. | First Name | Family Name | Province |
| 1 | Paroon | CHAMSUK | BKK |
| 2 | Takumi | WATANABE | BKK |
| 3 | Rainer | SCHESTAK | Austria* |
| S.No. | First Name | Family Name | Province |
| 1 | Yosita | SRIPORN | SNI |