The wheelchair tennis GERMAN OPEN - International German Championship - started in 1988.
It is part of the ITF Wheelchair Tennis Tour with more than 170 tournaments in 45 countries under the roof of the ITF, International Tennis Federation, London.
Starting in Heitersheim/Freiburg i.Br. in 1988, the tournament moved to Munich for eleven successful years (1994 was left out), then to Essen for another ten years. The GERMAN OPEN came to Berlin in 2011. This was made possible by an agreement between the DTB Deutscher Tennis Bund, German Tennis Association, and the Berlin Senate and its financial support for the tournament.
Two Berlin clubs, the “BTTC Grün-Weiss” and the “Zehlendorfer Wespen”, agreed to alternate in hosting the German Open. After five years the tournament has become a fixed institution in the calendar of Berlin’s sports events. Since 2015 the German Open is an IT 2-tournament and has increased the number of participants and of higher ranked players especially.
Many volunteers and ball kids of the two clubs help to run the tournament week and prepare a pleasant atmosphere for wheelchair athletes from all over the world.
Winners
| Men Main Draw Singles | Women Main Draw Singles | Quad Singles | |
| 2010 (Essen) | Tom Egberink (NED) | Aniek van Koot (NED) | not played |
| 2011 (Berlin) | Martin Legner (AUT) | Katharina Krüger (GER) | not played |
| 2012 (Berlin) | Robinson Mendez (CHI) | Maria Antonieta Ortiz (CHI) | Maximilian Laudan (GER) |
| 2013 (Berlin) | Takuya Miki (JPN) | Katharina Krüger (GER) | Maximilian Laudan (GER) |
| 2014 (Berlin) | Alfie Hewett (GBR) | Katharina Krüger (GER) | Ian Payne (GBR) |
| 2015 (Berlin) | Alfie Hewett (GBR) | Lucy Shuker (GBR) | Shota Kawano (JPN) |
| 2016 (Berlin) | Maikel Scheffers (NED) | Katharina Krüger (GER) | David Wagner (USA) |
| 2017 (Berlin) | Takashi Sanada (JPN) | Yui Kamiji (JPN) | David Wagner (USA) |
| 2018 (Berlin) | Frederic Cataneo (FRA) | Katharina Krüger (GER) | Niels Vink (NED) |
| 2019 (Berlin) | Tom Egbrink (NED) | Zhenzhen Zu (CHI) | Niels Vink (NED) |