| This article relies largely or entirely on a single source .(June 2025) | 
| Lambertz Open by STAWAG | |
|---|---|
| ATP Challenger Tour | |
| Location | Aachen, Germany | 
| Venue | Grün Weiss Aachen | 
| Category | ATP Challenger Series | 
| Surface | Carpet / Indoors | 
| Draw | 32S/32Q/16D | 
| Prize money | €42,500 | 
The Lambertz Open by STAWAG was a tennis tournament held in Aachen, Germany between 1991 and 2010. The event was part of the ATP Challenger Series and was played on indoor carpet courts.
| Year | Champion | Runner-up | Score | 
|---|---|---|---|
| 2010 |  Dustin Brown  [1] |  Igor Sijsling | 6–3, 7–6(3) | 
| 2009 |  Rajeev Ram |  Dustin Brown | 7–6(2), 6–7(5), 7–6(2) | 
| 2008 |  Evgeny Korolev |  Ruben Bemelmans | 7–6, 7–6 | 
| 2007 |  Evgeny Korolev |  Andreas Beck | 6–4, 6–4 | 
| 2006 |  Rainer Schüttler |  Evgeny Korolev | 6–3, 7–5 | 
| 2005 |  Evgeny Korolev |  Raemon Sluiter | 6–3, 7–6 | 
| 2004 |  Novak Djokovic |  Lars Burgsmüller | 6–4, 3–6, 6–4 | 
| 2003 |  Alexander Peya |  Jürgen Melzer | 7–6, 6–1 | 
| 2002 |  Vladimir Voltchkov |  Marc Rosset | 7–6, 6–4 | 
| 2001 |  Alexander Popp |  Axel Pretzsch | 6–3, 1–6, 6–2 | 
| 2000 |  Rainer Schüttler |  Johan Settergren | 7–6, 1–6, 6–1 | 
| 1999 |  Raemon Sluiter |  David Prinosil | 2–6, 6–4, 7–6 | 
| 1998 |  Hendrik Dreekmann |  Orlin Stanoytchev | 7–6, 6–4 | 
| 1997 |  Hendrik Dreekmann |  Jiří Novák | 5–7, 7–6, 6–3 | 
| 1996 |  Alexander Volkov |  David Prinosil | 6–3, 7–6 | 
| 1995 |  Jörn Renzenbrink |  Martin Damm | 5–7, 6–3, 6–4 | 
| 1994 |  Jan Siemerink |  David Prinosil | 5–7, 7–6, 6–4 | 
| 1993 |  Jonas Björkman |  Jan Apell | 6–3, 3–6, 7–5 | 
| 1992 |  Martin Damm |  Brett Steven | 6–4, 7–6 | 
| 1991 |  Alexander Mronz |  Martin Střelba | 6–4, 6–3 |