The women's singles SU5 tournament at the 2020 Summer Paralympics in Tokyo took place between 1 and 4 September 2021 at Yoyogi National Gymnasium.

[1] 10 Players entered the competition, They were divided in 3 Groups(A,B,C).

Best 2 group winners got byes to semifinals and the rest group winner and runners up competed in Quarter-finals for 2 semi-finals berths.

These were the seeds for this event:[2] The draw of the group stage revealed on 26 August 2021.

The top two winners of each group advanced to the knockout rounds.