# 1991 Tokyo Indoor – Singles

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.

## Seeds

* Stefan Edberg (champion)
* Boris Becker (quarterfinals)
* Ivan Lendl (semifinals)
* Andre Agassi (quarterfinals)
* David Wheaton (quarterfinals)
* Goran Ivanišević (semifinals)
* Derrick Rostagno (final)
* Michael Chang (quarterfinals)
* Andrei Chesnokov (third round)
* Richey Reneberg (third round)
* Todd Woodbridge (second round)
* MaliVai Washington (third round)
* Wally Masur (third round)
* Wayne Ferreira (second round)
* Frédéric Fontang (third round)
* Shuzo Matsuoka (third round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Stefan Edberg | 4 | 7$^7$ | 7 | | | | | |
| 6 | Goran Ivanišević | 6 | 6$^2$ | 5 | | | | | |
| 6 | Goran Ivanišević | 6 | 6$^2$ | 5 | 1 | Stefan Edberg | 6 | 1 | 6 |
| | | | | | 7 | Derrick Rostagno | 3 | 6 | 2 |
| 3 | Ivan Lendl | 6$^4$ | 2 | | 7 | Derrick Rostagno | 3 | 6 | 2 |
| 7 | Derrick Rostagno | 7$^7$ | 6 | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 1 | S Edberg | 6 | 6 | | | | | | | | |
| | D Pate | 6 | 6 | | D Pate | 2 | 4 | | | | | | | | |
| Q | J Sobel | 3 | 4 | | | | | 1 | S Edberg | 6 | 7 | | | | |
| | G Muller | 7 | 7$^7$ | | | | | 15 | F Fontang | 2 | 5 | | | | |
| | S Doseděl | 5 | 6$^5$ | | G Muller | 6$^3$ | 4 | | | | | | | | |
| | | | | 15 | F Fontang | 7$^7$ | 6 | | | | | | | | |
| | | | | | | | | | | | | 1 | S Edberg | 6 | 6 |
| | | | | | | | | | | | | 8 | M Chang | 2 | 2 |
| | | | | 9 | A Chesnokov | 7 | 6 | | | | | | | | |
| | P Canè | 6 | 6 | | P Canè | 5 | 3 | | | | | | | | |
| WC | H Tanizawa | 3 | 4 | | | | | 9 | A Chesnokov | 3 | 4 | | | | |
| | M Woodforde | 6 | 6 | | | | | 8 | M Chang | 6 | 6 | | | | |
| | P Lundgren | 1 | 3 | | M Woodforde | 1 | 4 | | | | | | | | |
| | | | | 8 | M Chang | 6 | 6 | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 4 | A Agassi | 7 | 6 | | | | | | | | | |
| | L Herrera | 3 | 6 | 6 | | L Herrera | 5 | 1 | | | | | | | | | |
| | D Marcelino | 6 | 1 | 4 | | | | | 4 | A Agassi | 6 | 7$^{10}$ | | | | | |
| Q | N Kroon | 2 | 6 | 5 | | | | | | J Tarango | 4 | 6$^8$ | | | | | |
| | J Tarango | 6 | 1 | 7 | | J Tarango | 7$^7$ | 6 | | | | | | | | | |
| | | | | | 14 | W Ferreira | 6$^5$ | 4 | | | | | | | | | |
| | | | | | | | | | | | | | | 4 | A Agassi | 3 | 4 |
| | | | | | | | | | | | | | | 6 | G Ivanišević | 6 | 6 |
| | | | | | 12 | M Washington | 6 | 7$^7$ | | | | | | | | | |
| | S Youl | 7$^7$ | 6 | | | S Youl | 4 | 6$^4$ | | | | | | | | | |
| | T Högstedt | 6$^5$ | 1 | | | | | | 12 | M Washington | 6$^8$ | 7$^7$ | 4 | | | | |
| | J Morgan | 3 | 5 | | | | | | 6 | G Ivanišević | 7$^{10}$ | 6$^3$ | 6 | | | | |
| | D Poliakov | 6 | 7 | | | D Poliakov | 4 | 2 | | | | | | | | | |
| | | | | | 6 | G Ivanišević | 6 | 6 | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 5 | D Wheaton | 7$^7$ | 3 | 6 | | | | | | | | | |
| Q | B-S Kim | 2 | 4 | | J Grabb | 6$^2$ | 6 | 2 | | | | | | | | | |
| | J Grabb | 6 | 6 | | | | | | 5 | D Wheaton | 6 | 6 | | | | | |
| | A Olhovskiy | 3 | 5 | | | | | | | G Pozzi | 0 | 2 | | | | | |
| | G Pozzi | 6 | 7 | | G Pozzi | 7$^7$ | 6 | | | | | | | | | | |
| | | | | 11 | T Woodbridge | 6$^0$ | 3 | | | | | | | | | | |
| | | | | | | | | | | | | | | 5 | D Wheaton | 6$^5$ | 5 |
| | | | | | | | | | | | | | | 3 | I Lendl | 7$^7$ | 7 |
| | | | | 13 | W Masur | 6 | 6 | | | | | | | | | | |
| Q | R Leach | 2 | 4 | Q | G Michibata | 0 | 3 | | | | | | | | | | |
| Q | G Michibata | 6 | 6 | | | | | | 13 | W Masur | 4 | 7$^7$ | 2 | | | | |
| | S Davis | 7$^7$ | 7$^7$ | | | | | | 3 | I Lendl | 6 | 6$^5$ | 6 | | | | |
| | N Borwick | 6$^3$ | 6$^4$ | | S Davis | 2 | 3 | | | | | | | | | | |
| | | | | 3 | I Lendl | 6 | 6 | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 7 | D Rostagno | 3 | 6 | 6 | | | | | | | | | | |
| | G Connell | 5 | 3 | | J Stoltenberg | 6 | 3 | 2 | | | | | | | | | | |
| | J Stoltenberg | 7 | 6 | | | | | | 7 | D Rostagno | 3 | 6 | 6 | | | | | |
| WC | R Tsujino | 4 | 5 | | | | | | 10 | R Reneberg | 6 | 3 | 4 | | | | | |
| | J Anderson | 6 | 7 | | J Anderson | 4 | 6$^5$ | | | | | | | | | | | |
| | | | | 10 | R Reneberg | 6 | 7$^7$ | | | | | | | | | | | |
| | | | | | | | | | | | | | | 7 | D Rostagno | 7$^7$ | 4 | 6 |
| | | | | | | | | | | | | | | 2 | B Becker | 6$^4$ | 6 | 3 |
| | | | | 16 | S Matsuoka | 2 | 6 | 7$^7$ | | | | | | | | | | |
| | R Weiss | 6 | 6 | | R Weiss | 6 | 2 | 6$^5$ | | | | | | | | | | |
| WC | Y Yamamoto | 2 | 3 | | | | | | 16 | S Matsuoka | 6 | 3 | 4 | | | | | |
| Q | D Orsanic | 3 | 4 | | | | | | 2 | B Becker | 2 | 6 | 6 | | | | | |
| | J Gunnarsson | 6 | 6 | | J Gunnarsson | 2 | 4 | | | | | | | | | | | |
| | | | | 2 | B Becker | 6 | 6 | | | | | | | | | | | |