|Category||ATP World Tour 500|
|Surface||Carpet - indoors (1970–77, 1997, 1999–2006)|
Hard - indoors 1978–96, 1998, 2007–present)
|Draw||32S / 16Q / 16D|
|Prize money||€1,984,420 (2018)|
|Current champions (2019)|
|Doubles|| Jean-Julien Rojer|
The tournament was created in 1970 by Roger Brennwald and originally featured mainly Swiss top players. It became an event on the Grand Prix tennis circuit in 1977, when Björn Borg won the title, and stayed until 1989. Since 2009 it has been part of the World Tour 500 Series of the ATP Tour. Before 2009, it was part of the ATP World Series from 1990 until 1999 which became the ATP International Series in 2000. It has been held annually at the St. Jakobshalle in Basel, Switzerland, in October, since 1995.
Basel native Roger Federer holds the record for most singles titles, having won the tournament ten times, in 2006–2008, 2010–2011, 2014–2015 and 2017–2019. Federer has reached the final a record fifteen times (2000–2001, 2006–2015, 2017–2019), which is also an Open Era record for most finals reached at a single ATP event.
Besides Federer, two other Swiss players have won the singles title: Michel Burgener, in 1972, and Jakob Hlasek, in 1991. The tournament was played on its unique red colored indoor courts until 2010; starting in 2011 the court color was changed to the uniform blue courts of most other tournaments in the European fall indoor season.
- "Tennis-Pionier Roger Brennwald: «Vielleicht fällt einmal ein neuer Federer vom Himmel»". Aargauer Zeitung (in German). 23 October 2017.
- Chris Chase (11 August 2010). "Relationship between tennis and tobacco goes back a long way". Yahoo! Sports.
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