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.

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.