2001 If Stockholm Open – Singles
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Thomas Johansson was the defending champion but lost in the quarterfinals to Jarkko Nieminen.
Sjeng Schalken won in the final 3–6, 6–3, 6–3, 4–6, 6–3 against Nieminen.
Seeds
- Australia Lleyton Hewitt (withdrew because of a back injury)
- France Sébastien Grosjean (second round)
- Sweden Thomas Johansson (quarterfinals)
- Argentina Guillermo Cañas (semifinals)
- Sweden Thomas Enqvist (semifinals)
- Netherlands Sjeng Schalken (champion)
- Morocco Younes El Aynaoui (second round)
- South Africa Wayne Ferreira (quarterfinals)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted
Final
| Semifinals | Final | ||||||||||||||
| 6 | Netherlands Sjeng Schalken | 6 | 6 | ||||||||||||
| 4 | Argentina Guillermo Cañas | 4 | 2 | ||||||||||||
| 6 | Netherlands Sjeng Schalken | 3 | 6 | 6 | 4 | 6 | |||||||||
| Q | Finland Jarkko Nieminen | 6 | 3 | 3 | 6 | 3 | |||||||||
| Q | Finland Jarkko Nieminen | 77 | 6 | ||||||||||||
| 5 | Sweden Thomas Enqvist | 64 | 3 |
Section 1
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| LL | Czech Republic J Vacek | 6 | 78 | ||||||||||||||||||||||||
| Spain D Sánchez | 3 | 66 | LL | Czech Republic J Vacek | 6 | 3 | 6 | ||||||||||||||||||||
| Spain F Clavet | 4 | 3 | Sweden M Gustafsson | 3 | 6 | 3 | |||||||||||||||||||||
| Sweden M Gustafsson | 6 | 6 | LL | Czech Republic J Vacek | 3 | 63 | |||||||||||||||||||||
| Australia W Arthurs | 6 | 6 | 6 | Netherlands S Schalken | 6 | 77 | |||||||||||||||||||||
| Q | Netherlands P Wessels | 3 | 4 | Australia W Arthurs | 4 | 3 | |||||||||||||||||||||
| Q | Netherlands J van Lottum | 1 | 3 | 6 | Netherlands S Schalken | 6 | 6 | ||||||||||||||||||||
| 6 | Netherlands S Schalken | 6 | 6 | 6 | Netherlands S Schalken | 6 | 6 | ||||||||||||||||||||
| 4 | Argentina G Cañas | 6 | 6 | 4 | Argentina G Cañas | 4 | 2 | ||||||||||||||||||||
| Germany N Kiefer | 3 | 2 | 4 | Argentina G Cañas | 6 | 6 | |||||||||||||||||||||
| WC | Sweden M Larsson | 6 | 7 | WC | Sweden M Larsson | 2 | 3 | ||||||||||||||||||||
| Q | United States B Bryan | 4 | 5 | 4 | Argentina G Cañas | 6 | 6 | ||||||||||||||||||||
| Sweden A Vinciguerra | 6 | 77 | 8 | South Africa W Ferreira | 3 | 1 | |||||||||||||||||||||
| WC | Sweden J Johansson | 3 | 64 | Sweden A Vinciguerra | 77 | 66 | 63 | ||||||||||||||||||||
| Belgium C Rochus | 5 | 2 | 8 | South Africa W Ferreira | 63 | 78 | 77 | ||||||||||||||||||||
| 8 | South Africa W Ferreira | 7 | 6 |
Section 2
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | Morocco Y El Aynaoui | 77 | 6 | ||||||||||||||||||||||||
| Argentina F Squillari | 65 | 4 | 7 | Morocco Y El Aynaoui | 3 | 1 | |||||||||||||||||||||
| Denmark K Pless | 61 | 3 | Q | Finland J Nieminen | 6 | 6 | |||||||||||||||||||||
| Q | Finland J Nieminen | 77 | 6 | Q | Finland J Nieminen | 6 | 6 | ||||||||||||||||||||
| France C Pioline | 6 | 6 | 3 | Sweden T Johansson | 2 | 4 | |||||||||||||||||||||
| Sweden J Björkman | 3 | 4 | France C Pioline | 1 | 7 | 3 | |||||||||||||||||||||
| Austria M Hipfl | 77 | 4 | 1r | 3 | Sweden T Johansson | 6 | 5 | 6 | |||||||||||||||||||
| 3 | Sweden T Johansson | 64 | 6 | 4 | Q | Finland J Nieminen | 77 | 6 | |||||||||||||||||||
| 5 | Sweden T Enqvist | 7 | 6 | 5 | Sweden T Enqvist | 64 | 3 | ||||||||||||||||||||
| Czech Republic M Tabara | 5 | 3 | 5 | Sweden T Enqvist | 7 | 6 | |||||||||||||||||||||
| Paraguay R Delgado | 3 | 3 | WC | Sweden R Söderling | 5 | 3 | |||||||||||||||||||||
| WC | Sweden R Söderling | 6 | 6 | 5 | Sweden T Enqvist | 6 | 67 | 7 | |||||||||||||||||||
| Chile M Ríos | 6 | 3 | 6 | Chile M Ríos | 4 | 79 | 5 | ||||||||||||||||||||
| United States M Russell | 2 | 6 | 4 | Chile M Ríos | 6 | 6 | |||||||||||||||||||||
| Australia M Philippoussis | 2 | 7 | 2 | 2 | France S Grosjean | 3 | 4 | ||||||||||||||||||||
| 2 | France S Grosjean | 6 | 5 | 6 |