Jan Siemerink tennis profile
| Tournament | Stage | Opponent |
|---|---|---|
| Amersfoort 2002 | Q16 | Kristian Pless |
| Rotterdam 2002 | Q8 | Dennis Van scheppingen |
| Q16 | Ivan Ljubicic | |
| Tashkent 2001 | Semifinals | Sjeng Schalken |
| Quarterfinals | Rainer Schuettler | |
| Q8 | Noam Behr | |
| Q16 | Taylor Dent | |
| US Open 2001 | Q32 | Jaime Oncins |
| Q32 | Arnaud Clement | |
| Q64 | Jiri Vanek | |
| Kitzbuhel 2001 | Q32 | Stefan Koubek |
| Amsterdam 2001 | Quarterfinals | Robbie Koenig |
| Q8 | John Van lottum | |
| Q8 | Sjeng Schalken | |
| Q16 | Andre Sa | |
| Newport 2001 | Quarterfinals | Andre Sa |
| Q8 | Jonathan Erlich | |
| Q16 | Jeff Salzenstein | |
| Wimbledon 2001 | Q16 | Petr Pala |
| Q32 | Petr Luxa |