2001 AIG Japan Open Tennis Championships – Men's singles
# 2001 AIG Japan Open Tennis Championships – Men's singles

Sjeng Schalken was the defending champion but lost in the quarterfinals to Michel Kratochvil.

Lleyton Hewitt won in the final 6–4, 6–2 against Kratochvil.

## Seeds

The top eight seeds received a bye to the second round.

* Lleyton Hewitt (champion)
* Sjeng Schalken (quarterfinals)
* Rainer Schüttler (third round)
* Jonas Björkman (third round)
* Michel Kratochvil (final)
* Michael Chang (third round)
* Marcelo Ríos (quarterfinals)
* Francisco Clavet (quarterfinals)
* Lars Burgsmüller (third round)
* Harel Levy (second round)
* Nicolás Massú (third round)
* Andrew Ilie (first round)
* Álex Calatrava (first round)
* Wayne Arthurs (second round)
* Michael Russell (third round)
* Ramón Delgado (second 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 | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - |
| 1 | Lleyton Hewitt | 6 | 6 | | | | |
| | James Blake | 4 | 0 | | | | |
| | James Blake | 4 | 0 | 1 | Lleyton Hewitt | 6 | 6 |
| | | | | 5 | Michel Kratochvil | 4 | 2 |
| | Karol Kučera | 0 | 3 | 5 | Michel Kratochvil | 4 | 2 |
| 5 | Michel Kratochvil | 6 | 6 | | | | |

### Top half

**Section 1**

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | 1 | L Hewitt | 6 | 6 | | | | | | | | | | |
| | J Delgado | 4 | 4 | | M-K Goellner | 2 | 2 | | | | | | | | | | |
| | M-K Goellner | 6 | 6 | | | | | | 1 | L Hewitt | 6 | 6 | | | | | |
| Q | J Thomas | 3 | 2 | | | | | | 15 | M Russell | 1 | 1 | | | | | |
| | C Mamiit | 6 | 6 | | C Mamiit | 6 | 4 | 3 | | | | | | | | | |
| | N Godwin | 4 | $6^1$ | 15 | M Russell | 3 | 6 | 6 | | | | | | | | | |
| 15 | M Russell | 6 | $7^7$ | | | | | | | | | | 1 | L Hewitt | 4 | 6 | 6 |
| 11 | N Massú | 6 | 6 | | | | | | | | | | 8 | F Clavet | 6 | 4 | 2 |
| | E Kempes | 4 | 4 | 11 | N Massú | 6 | $7^7$ | | | | | | | | | | |
| | Y-I Yoon | 3 | 1 | | T Zíb | 3 | $6^4$ | | | | | | | | | | |
| | T Zíb | 6 | 6 | | | | | | 11 | N Massú | 3 | 4 | | | | | |
| | N Thomann | 3 | 1 | | | | | | 8 | F Clavet | 6 | 6 | | | | | |
| | T Behrend | 6 | 6 | | T Behrend | $6^7$ | 2 | | | | | | | | | | |
| | | | | 8 | F Clavet | $7^9$ | 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 4 | J Björkman | 6 | 6 | | | | | | | | | |
| Q | M Onoda | 4 | 4 | | WC | H Kondo | 1 | 3 | | | | | | | | | |
| WC | H Kondo | 6 | 6 | | | | | | 4 | J Björkman | 1 | 5 | | | | | |
| | J Blake | 6 | 6 | | | | | | | J Blake | 6 | 7 | | | | | |
| WC | Y Ishii | 3 | 4 | | | J Blake | $7^7$ | 7 | | | | | | | | | |
| Q | R Žitko | 2 | $7^7$ | 1 | 14 | W Arthurs | $6^4$ | 5 | | | | | | | | | |
| 14 | W Arthurs | 6 | $6^3$ | 6 | | | | | | | | | | J Blake | 4 | 6 | 6 |
| 10 | H Levy | 6 | 6 | | | | | | | | | | 7 | M Ríos | 6 | 4 | 1 |
| Q | S Iwabuchi | 3 | 3 | | 10 | H Levy | 5 | 0 | | | | | | | | | |
| Q | D Udomchoke | 6 | 4 | 6 | Q | D Udomchoke | 7 | 6 | | | | | | | | | |
| | B Cowan | 2 | 6 | 3 | | | | | Q | D Udomchoke | 3 | 2 | | | | | |
| | B Black | 6 | 6 | | | | | | 7 | M Ríos | 6 | 6 | | | | | |
| | E Taino | 4 | 1 | | | B Black | 2 | 5 | | | | | | | | | |
| | | | | | 7 | M Ríos | 6 | 7 | | | | | | | | | |

### Bottom half

**Section 3**

| First round | 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 6 | M Chang | 6 | 6 | | | | | | | | | |
| | A Pretzsch | $6^3$ | $7^7$ | 6 | | A Pretzsch | 3 | 4 | | | | | | | | | |
| | P Srichaphan | $7^7$ | $6^5$ | 1 | | | | | | 6 | M Chang | $6^3$ | 2 | | | | |
| | S Sargsian | 6 | 6 | | | | | | | WC | T Suzuki | $7^7$ | 6 | | | | |
| | A Sá | 2 | 3 | | | S Sargsian | 5 | 6 | 4 | | | | | | | | |
| WC | T Suzuki | 5 | 6 | 6 | WC | T Suzuki | 7 | 4 | 6 | | | | | | | | |
| 12 | A Ilie | 7 | 2 | 4 | | | | | | | | | | WC | T Suzuki | 3 | 3 |
| 16 | R Delgado | 6 | 6 | | | | | | | | | | | | K Kučera | 6 | 6 |
| WC | G Motomura | 4 | 4 | | 16 | R Delgado | 4 | 4 | | | | | | | | | |
| | K Kučera | 6 | 4 | 6 | | K Kučera | 6 | 6 | | | | | | | | | |
| | A Simoni | 3 | 6 | 1 | | | | | | | K Kučera | 6 | 6 | | | | |
| | M Lee | 4 | 2 | | | | | | | 3 | R Schüttler | 2 | 2 | | | | |
| | M Larsson | 6 | 6 | | | M Larsson | 3 | 5 | | | | | | | | | |
| | | | | | 3 | R Schüttler | 6 | 7 | | | | | | | | | |

**Section 4**

| First round | 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 5 | M Kratochvil | $7^7$ | 1 | 6 | | | | | | | | |
| | O Fukárek | 6 | $7^7$ | | | O Fukárek | $6^3$ | 6 | 4 | | | | | | | | |
| Q | D Vacek | 2 | $6^3$ | | | | | | | 5 | M Kratochvil | 6 | 6 | | | | |
| | H-T Lee | $7^{13}$ | 6 | | | | | | | 9 | L Burgsmüller | 3 | 2 | | | | |
| | M Hantschk | $6^{11}$ | 4 | | | H-T Lee | 6 | 3 | 5 | | | | | | | | |
| | M Llodra | $6^3$ | 6 | 2 | 9 | L Burgsmüller | 3 | 6 | 7 | | | | | | | | |
| 9 | L Burgsmüller | $7^7$ | 2 | 6 | | | | | | | | | | 5 | M Kratochvil | 6 | 6 |
| 13 | Á Calatrava | 3 | 1 | | | | | | | | | | | 2 | S Schalken | 3 | 4 |
| | I Heuberger | 6 | 6 | | | I Heuberger | 3 | 6 | 6 | | | | | | | | |
| Q | N Behr | 6 | 6 | | Q | N Behr | 6 | 4 | 4 | | | | | | | | |
| WC | T Terachi | 2 | 1 | | | | | | | | I Heuberger | 2 | 2 | | | | |
| | I Labadze | $7^7$ | 3 | 5 | | | | | | 2 | S Schalken | 6 | 6 | | | | |
| | C Vinck | $6^3$ | 6 | 7 | | C Vinck | 3 | 4 | | | | | | | | | |
| | | | | | 2 | S Schalken | 6 | 6 | | | | | | | | | |
