Group A was one of the two groups of competing nations at the 2020 AFF Championship. It consisted of Thailand, Myanmar, the Philippines, hosts Singapore and Timor-Leste. The matches took place from 5 to 18 December 2021. Thailand and hosts Singapore, as the top two teams, advanced to the semi-finals.
Thailand topped the group with four group game victories. Singapore would advance as runners-up, with three wins and a loss. The Philippines finished third, Myanmar finished fourth, having won one game, while Timor-Leste finished fifth without registering a single point.
↑"Men's Ranking". Fédération Internationale de Football Association. 19 November 2021. Retrieved 22 November 2021.
↑"Thailand loses right to host tournaments". Bangkok Post. Bangkok Post Public Co. Ltd. Retrieved 25 November 2021. The country has also been denied the right to display its national flag at any such events (international football events).
12345Due to non-compliance with conditions set by the World Anti-Doping Agency (WADA), Thailand was not allowed to be represented by its national flag. The sanctions took effect in October 2021.