| Singles | |
|---|---|
| 2001 Gerry Weber Open | |
| Champion |  Thomas Johansson |
| Runner-up |  Fabrice Santoro |
| Final score | 6–3, 6–7(5–7), 6–2 |
| Draw | 32 |
| Seeds | 8 |
David Prinosil was the defending champion but lost in the second round to Roger Federer.
Thomas Johansson won in the final 6–3, 6–7(5–7), 6–2 against Fabrice Santoro.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
Yevgeny Kafelnikov (semifinals)
Patrick Rafter (semifinals) Sébastien Grosjean (second round) Arnaud Clément (first round)
Àlex Corretja (first round)
Roger Federer (quarterfinals) Thomas Johansson (champion)
Tommy Haas (second round)| Semifinals | Final | ||||||||||||
| 1 | Yevgeny Kafelnikov | 3 | 6 | 2 | |||||||||
| 7 | Thomas Johansson | 6 | 5 | 6 | |||||||||
| 7 | Thomas Johansson | 6 | 65 | 6 | |||||||||
| Fabrice Santoro | 3 | 77 | 2 | ||||||||||
| Fabrice Santoro | 7 | 6 | |||||||||||
| 2 | Patrick Rafter | 5 | 4 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | Y Kafelnikov | 6 | 4 | 6 | |||||||||||||||||||||||
| Q |  T Ketola | 3 | 6 | 2 | 1 | Y Kafelnikov | 6 | 6 | |||||||||||||||||||
| R Schüttler | 6 | 6 | R Schüttler | 4 | 4 | ||||||||||||||||||||||
 N Lapentti | 4 | 4 | 1 | Y Kafelnikov | 62 | 77 | 77 | ||||||||||||||||||||
| N Escudé | 6 | 6 | N Escudé | 77 | 63 | 64 | |||||||||||||||||||||
| Q |  D Nestor | 1 | 2 | N Escudé | 6 | 6 | |||||||||||||||||||||
 M Mirnyi | 4 | 4 | 8 | T Haas | 3 | 4 | |||||||||||||||||||||
| 8 | T Haas | 6 | 6 | 1 | Y Kafelnikov | 3 | 7 | 2 | |||||||||||||||||||
| 4 | A Clément | 3 | 4 | 7 | T Johansson | 6 | 5 | 6 | |||||||||||||||||||
| N Kiefer | 6 | 6 | N Kiefer | 63 | 77 | 61 | |||||||||||||||||||||
 S Schalken | 1 | 4 | J Björkman | 77 | 64 | 77 | |||||||||||||||||||||
| J Björkman | 6 | 6 | J Björkman | 4 | 2 | ||||||||||||||||||||||
| Á Calatrava | 65 | 4 | 7 | T Johansson | 6 | 6 | |||||||||||||||||||||
| M Larsson | 77 | 6 | M Larsson | 5 | 5 | ||||||||||||||||||||||
 M Chang | 2 | 5 | 7 | T Johansson | 7 | 7 | |||||||||||||||||||||
| 7 | T Johansson | 6 | 7 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | À Corretja | 0 | 2 | ||||||||||||||||||||||||
| J Golmard | 6 | 6 | J Golmard | 6 | 4 | 5 | |||||||||||||||||||||
| Q | C Saulnier | 62 | 2 | WC | L Burgsmüller | 4 | 6 | 7 | |||||||||||||||||||
| WC | L Burgsmüller | 77 | 6 | WC | L Burgsmüller | 63 | 4 | ||||||||||||||||||||
| WC | A Popp | 2 | 3 | F Santoro | 77 | 6 | |||||||||||||||||||||
| F Santoro | 6 | 6 | F Santoro | 7 | 7 | ||||||||||||||||||||||
| Q |  W Black | 7 | 3 | 1 | 3 | S Grosjean | 5 | 5 | |||||||||||||||||||
| 3 | S Grosjean | 5 | 6 | 6 | F Santoro | 7 | 6 | ||||||||||||||||||||
| 6 | R Federer | 64 | 6 | 6 | 2 | P Rafter | 5 | 4 | |||||||||||||||||||
| A Portas | 77 | 4 | 2 | 6 | R Federer | 710 | 7 | ||||||||||||||||||||
| D Prinosil | 77 | 77 | D Prinosil | 68 | 5 | ||||||||||||||||||||||
| WC | C Moyá | 65 | 64 | 6 | R Federer | 6 | 66 | 64 | |||||||||||||||||||
 A Pavel | 6 | 6 | 2 | P Rafter | 4 | 78 | 77 | ||||||||||||||||||||
 B Ulihrach | 1 | 3 | A Pavel | 3 | 3 | ||||||||||||||||||||||
| D Vacek | 3 | 4 | 2 | P Rafter | 6 | 6 | |||||||||||||||||||||
| 2 | P Rafter | 6 | 6 | ||||||||||||||||||||||||
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