![Germany's Christopher Kas reacts during his Tennis Davis Cup World Group first round match against Stefan Koubek of Austria in Garmisch Partenkirchen, southern Germany, Sunday, March 8, 2009. (AP Photo/Kerstin Joensson Stock Germany's Christopher Kas reacts during his Tennis Davis Cup World Group first round match against Stefan Koubek of Austria in Garmisch Partenkirchen, southern Germany, Sunday, March 8, 2009. (AP Photo/Kerstin Joensson Stock](https://c8.alamy.com/comp/2P8T10X/germanys-christopher-kas-reacts-during-his-tennis-davis-cup-world-group-first-round-match-against-stefan-koubek-of-austria-in-garmisch-partenkirchen-southern-germany-sunday-march-8-2009-ap-photokerstin-joensson-2P8T10X.jpg)
Germany's Christopher Kas reacts during his Tennis Davis Cup World Group first round match against Stefan Koubek of Austria in Garmisch Partenkirchen, southern Germany, Sunday, March 8, 2009. (AP Photo/Kerstin Joensson Stock
![Christopher Kas Philipp Kohlschreiber Facing Germany Foto de stock de contenido editorial - Imagen de stock | Shutterstock Christopher Kas Philipp Kohlschreiber Facing Germany Foto de stock de contenido editorial - Imagen de stock | Shutterstock](https://editorial01.shutterstock.com/preview-440/7758121o/a40b0e11/Shutterstock_7758121o.jpg)
Christopher Kas Philipp Kohlschreiber Facing Germany Foto de stock de contenido editorial - Imagen de stock | Shutterstock
![Christopher Kas L Philipp Kohlschreiber Germany Foto de stock de contenido editorial - Imagen de stock | Shutterstock Christopher Kas L Philipp Kohlschreiber Germany Foto de stock de contenido editorial - Imagen de stock | Shutterstock](https://editorial01.shutterstock.com/preview-440/7758121r/745c9460/Shutterstock_7758121r.jpg)
Christopher Kas L Philipp Kohlschreiber Germany Foto de stock de contenido editorial - Imagen de stock | Shutterstock
![Christopher Kas (Deutschland) und Tochter Kimi Sophia Tennis Herren Mercedes Cup 2009, ATP Tour Grup Christopher Kas (Deutschland) und Tochter Kimi Sophia Tennis Herren Mercedes Cup 2009, ATP Tour Grup](https://cdn.imago-images.com/bild/sp/0004632765/m.jpg)
Christopher Kas (Deutschland) und Tochter Kimi Sophia Tennis Herren Mercedes Cup 2009, ATP Tour Grup
![24 May 2018, Germany, Nuremberg: Tennis: WTA Tour - Nuremberg, women's singles. Christopher Kas, coach of German tennis player Mona Barthel, watches the match. Photo: Daniel Karmann/dpa Credit: dpa picture alliance/Alamy Live 24 May 2018, Germany, Nuremberg: Tennis: WTA Tour - Nuremberg, women's singles. Christopher Kas, coach of German tennis player Mona Barthel, watches the match. Photo: Daniel Karmann/dpa Credit: dpa picture alliance/Alamy Live](https://c8.alamy.com/comp/MPP8YM/24-may-2018-germany-nuremberg-tennis-wta-tour-nuremberg-womens-singles-christopher-kas-coach-of-german-tennis-player-mona-barthel-watches-the-match-photo-daniel-karmanndpa-credit-dpa-picture-alliancealamy-live-news-MPP8YM.jpg)
24 May 2018, Germany, Nuremberg: Tennis: WTA Tour - Nuremberg, women's singles. Christopher Kas, coach of German tennis player Mona Barthel, watches the match. Photo: Daniel Karmann/dpa Credit: dpa picture alliance/Alamy Live
![Christopher Kas, right, and Philipp Kohlschreiber from Germany, look on in their match against Jeremy Chardy and Nikolas Mahut from France during the doubles match between Germany and France in the blue Christopher Kas, right, and Philipp Kohlschreiber from Germany, look on in their match against Jeremy Chardy and Nikolas Mahut from France during the doubles match between Germany and France in the blue](https://c8.alamy.com/comp/2P7GJEH/christopher-kas-right-and-philipp-kohlschreiber-from-germany-look-on-in-their-match-against-jeremy-chardy-and-nikolas-mahut-from-france-during-the-doubles-match-between-germany-and-france-in-the-blue-group-of-the-tennis-world-team-cup-tournament-in-duesseldorf-germany-monday-may-17-2010-apn-photohermann-j-knippertz-2P7GJEH.jpg)
Christopher Kas, right, and Philipp Kohlschreiber from Germany, look on in their match against Jeremy Chardy and Nikolas Mahut from France during the doubles match between Germany and France in the blue
![Manager Christopher Kas gratuliert dem Sieger Nikoloz Basilashvili ( GEO), TC Grosshesselohe Herren Bundesliga Tennis Herren Bundesliga Tennis - Grosshesselohe-Muenchen - - TC Grosshesselohe - Germany - 2019 | Juergen Hasenkopf Photography Manager Christopher Kas gratuliert dem Sieger Nikoloz Basilashvili ( GEO), TC Grosshesselohe Herren Bundesliga Tennis Herren Bundesliga Tennis - Grosshesselohe-Muenchen - - TC Grosshesselohe - Germany - 2019 | Juergen Hasenkopf Photography](https://m.psecn.photoshelter.com/img-get/I0000ui7ME7jloqc/s/1200/I0000ui7ME7jloqc.jpg)
Manager Christopher Kas gratuliert dem Sieger Nikoloz Basilashvili ( GEO), TC Grosshesselohe Herren Bundesliga Tennis Herren Bundesliga Tennis - Grosshesselohe-Muenchen - - TC Grosshesselohe - Germany - 2019 | Juergen Hasenkopf Photography
![German doubles Andreas Beck, right, and Christopher Kas, center, celebrate with team captain Patrick Kuehnen after beating South African doubles Rik de Voest and Wesley Moodie during a tennis Davis Cup relegation German doubles Andreas Beck, right, and Christopher Kas, center, celebrate with team captain Patrick Kuehnen after beating South African doubles Rik de Voest and Wesley Moodie during a tennis Davis Cup relegation](https://c8.alamy.com/comp/2ND3EXF/german-doubles-andreas-beck-right-and-christopher-kas-celebrate-after-beating-south-african-doubles-rik-de-voest-and-wesley-moodie-during-a-tennis-davis-cup-relegation-match-of-the-world-group-between-germany-and-south-africa-in-stuttgart-southern-germany-saturday-sept-18-2010-ap-photomichael-probst-2ND3EXF.jpg)
German doubles Andreas Beck, right, and Christopher Kas, center, celebrate with team captain Patrick Kuehnen after beating South African doubles Rik de Voest and Wesley Moodie during a tennis Davis Cup relegation
![TC Grosshesselohe Manager Christopher Kas und TOPSEED Manager Stefan Leiner (lks), Herren Bundesliga Tennis Herren Bundesliga Tennis - Grosshesselohe-Muenchen - - TC Grosshesselohe - Germany - 2019 | Juergen Hasenkopf Photography TC Grosshesselohe Manager Christopher Kas und TOPSEED Manager Stefan Leiner (lks), Herren Bundesliga Tennis Herren Bundesliga Tennis - Grosshesselohe-Muenchen - - TC Grosshesselohe - Germany - 2019 | Juergen Hasenkopf Photography](https://m.psecn.photoshelter.com/img-get2/I0000eViza.ybfj8/fit=1000x750/Christopher-Kas-20190721-225591.jpg)
TC Grosshesselohe Manager Christopher Kas und TOPSEED Manager Stefan Leiner (lks), Herren Bundesliga Tennis Herren Bundesliga Tennis - Grosshesselohe-Muenchen - - TC Grosshesselohe - Germany - 2019 | Juergen Hasenkopf Photography
![London, UK, 1st July 2022: Christopher Kas, coach from german Jule Niemeier, celebrates during the Wimbledon Tennis Championships 2022 at the All England Lawn Tennis and Croquet Club in London. Credit: Frank London, UK, 1st July 2022: Christopher Kas, coach from german Jule Niemeier, celebrates during the Wimbledon Tennis Championships 2022 at the All England Lawn Tennis and Croquet Club in London. Credit: Frank](https://c8.alamy.com/comp/2JFA4XH/london-uk-1st-july-2022-christopher-kas-coach-from-german-jule-niemeier-celebrates-during-the-wimbledon-tennis-championships-2022-at-the-all-england-lawn-tennis-and-croquet-club-in-london-credit-frank-molteralamy-live-news-2JFA4XH.jpg)
London, UK, 1st July 2022: Christopher Kas, coach from german Jule Niemeier, celebrates during the Wimbledon Tennis Championships 2022 at the All England Lawn Tennis and Croquet Club in London. Credit: Frank
![Sweden's Johan Brunstroem (R) and Danmark's Frederik Nielsen (L) against Germany's Martin Emmrich..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-48838466 | agefotostock Sweden's Johan Brunstroem (R) and Danmark's Frederik Nielsen (L) against Germany's Martin Emmrich..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-48838466 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/80751664580bfef1e629538bc5aa77cf/pah-48838466.jpg)
Sweden's Johan Brunstroem (R) and Danmark's Frederik Nielsen (L) against Germany's Martin Emmrich..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-48838466 | agefotostock
![Jule Niemeier trennt sich von Coach Christopher Kas: Deutsche zieht Schlussstrich nach schlechten Ergebnissen - Eurosport Jule Niemeier trennt sich von Coach Christopher Kas: Deutsche zieht Schlussstrich nach schlechten Ergebnissen - Eurosport](https://imgresizer.eurosport.com/unsafe/1200x0/filters:format(jpeg)/origin-imgresizer.eurosport.com/2023/08/28/3772965-76749228-2560-1440.jpg)
Jule Niemeier trennt sich von Coach Christopher Kas: Deutsche zieht Schlussstrich nach schlechten Ergebnissen - Eurosport
![Next Up: Is Niemeier Germany's next Crown Jule? - Official Site of the 2023 US Open Tennis Championships - A USTA Event Next Up: Is Niemeier Germany's next Crown Jule? - Official Site of the 2023 US Open Tennis Championships - A USTA Event](https://photo-assets.usopen.org/images/pics/large/f_GettyImages-1241606448.jpg)