![The captain of the Swiss Fed Cup tennis team Heinz Guenthardt (L) speaks with Timea Bacsinszky during a training session in Yverdon April 18, 2012. Switzerland will play against Belarus April 21 The captain of the Swiss Fed Cup tennis team Heinz Guenthardt (L) speaks with Timea Bacsinszky during a training session in Yverdon April 18, 2012. Switzerland will play against Belarus April 21](https://c8.alamy.com/comp/2CY080C/the-captain-of-the-swiss-fed-cup-tennis-team-heinz-guenthardt-l-speaks-with-timea-bacsinszky-during-a-training-session-in-yverdon-april-18-2012-switzerland-will-play-against-belarus-april-21-to-22-2012-reutersdenis-balibouse-switzerland-tags-sport-tennis-2CY080C.jpg)
The captain of the Swiss Fed Cup tennis team Heinz Guenthardt (L) speaks with Timea Bacsinszky during a training session in Yverdon April 18, 2012. Switzerland will play against Belarus April 21
![Martina Hingis (L) of Switzerland and Anna Kournikova of Russia talk strategy during their doubles match against Laura… | Martina hingis, Tennis stars, Monica seles Martina Hingis (L) of Switzerland and Anna Kournikova of Russia talk strategy during their doubles match against Laura… | Martina hingis, Tennis stars, Monica seles](https://i.pinimg.com/736x/0a/bd/df/0abddf060b5628d071de3dea565bcbe1.jpg)
Martina Hingis (L) of Switzerland and Anna Kournikova of Russia talk strategy during their doubles match against Laura… | Martina hingis, Tennis stars, Monica seles
![Stan Wawrinka of Switzerland gestures towards the coaches and family box of Roger Federer of Switzerland, during their semi-final tennis match at the ATP World Tour Finals at the O2 Arena in Stan Wawrinka of Switzerland gestures towards the coaches and family box of Roger Federer of Switzerland, during their semi-final tennis match at the ATP World Tour Finals at the O2 Arena in](https://c8.alamy.com/compfr/2e69x69/stan-wawrinka-of-switzerland-gestures-towards-the-coaches-and-family-box-of-roger-federer-of-switzerland-during-their-semi-final-tennis-match-at-the-atp-world-tour-finals-at-the-o2-arena-in-london-november-15-2014-switzerlands-potential-davis-cup-fairytale-this-weekend-has-become-clouded-by-uncertainty-over-the-fitness-of-federer-and-suggestions-of-strained-relations-between-the-all-time-great-and-his-team-mate-wawrinka-not-only-did-the-draining-final-moments-of-federers-win-at-the-atp-tour-finals-semi-final-against-wawrinka-reawaken-his-old-back-trouble-forcing-him-to-withdraw-before-s-2e69x69.jpg)
Stan Wawrinka of Switzerland gestures towards the coaches and family box of Roger Federer of Switzerland, during their semi-final tennis match at the ATP World Tour Finals at the O2 Arena in
Federer erspielt sich Duell gegen Wawrinka: «Ein Schweizer wird im Halbfinale sein. Ich hoffe, dass ich es bin» - watson
![Roger Federer of Switzerland returns the ball to Philipp Kohlschreiber (L) of Germany in the third s Roger Federer of Switzerland returns the ball to Philipp Kohlschreiber (L) of Germany in the third s](https://www.imago-images.de/bild/sp/0020977400/w.jpg)
Roger Federer of Switzerland returns the ball to Philipp Kohlschreiber (L) of Germany in the third s
![SWITZERLAND'S MARC-ANDREA HUESLER L DOMINIC STEPHAN Editorial Stock Photo - Stock Image | Shutterstock SWITZERLAND'S MARC-ANDREA HUESLER L DOMINIC STEPHAN Editorial Stock Photo - Stock Image | Shutterstock](https://editorial01.shutterstock.com/wm-preview-1500/12450360a/8a38ed15/Shutterstock_12450360a.jpg)
SWITZERLAND'S MARC-ANDREA HUESLER L DOMINIC STEPHAN Editorial Stock Photo - Stock Image | Shutterstock
![Germany's Angelique Kerber (R) celebrates after winning against Switzerland's Timea Bacsinszky (L)..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-65669155 | agefotostock Germany's Angelique Kerber (R) celebrates after winning against Switzerland's Timea Bacsinszky (L)..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-65669155 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/7e2289114cde37d29e8dc972aeca6746/pah-65669155.jpg)
Germany's Angelique Kerber (R) celebrates after winning against Switzerland's Timea Bacsinszky (L)..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-65669155 | agefotostock
![Switzerland's Davis Cup tennis team player Roger Federer (L) and Stanislas Wawrinka play during their Davis Cup world group playoff doubles match against Portugal's Frederico Gil and Leonardo Tavares in Bern July Switzerland's Davis Cup tennis team player Roger Federer (L) and Stanislas Wawrinka play during their Davis Cup world group playoff doubles match against Portugal's Frederico Gil and Leonardo Tavares in Bern July](https://c8.alamy.com/comp/2CY8231/switzerlands-davis-cup-tennis-team-player-roger-federer-l-and-stanislas-wawrinka-play-during-their-davis-cup-world-group-playoff-doubles-match-against-portugals-frederico-gil-and-leonardo-tavares-in-bern-july-9-2011-reutersromina-amato-switzerland-tags-sport-tennis-2CY8231.jpg)