1991 Tokyo Indoor – Singles
| Singles | |
|---|---|
| 1991 Tokyo Indoor | |
| Champion |
 Stefan Edberg
|
| Runner-up |
 Derrick Rostagno
|
| Final score | 6–3, 1–6, 6–2 |
Ivan Lendl was the defending champion, but lost in the semifinals this year.
Stefan Edberg won the title, defeating Derrick Rostagno in the final, 6–3, 1–6, 6–2.
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