The draw of the group stage revealed on 26 August 2021.[3] The group stage was played from 1 to 3 September. The top two winners of each group advanced to the knockout rounds.
^"Men's singles SU5 – Seeds"(PDF). Olympics.com. Tokyo Organising Committee of the Olympic and Paralympic Games. Archived from the original(PDF) on 28 August 2021. Retrieved 28 August 2021.