![BIEL, SWITZERLAND - APRIL 13 : Timea Bacsinszky in action at the 2017 Ladies Open Biel WTA International tennis tournament Stock Photo - Alamy BIEL, SWITZERLAND - APRIL 13 : Timea Bacsinszky in action at the 2017 Ladies Open Biel WTA International tennis tournament Stock Photo - Alamy](https://c8.alamy.com/comp/J0MG8G/biel-switzerland-april-13-timea-bacsinszky-in-action-at-the-2017-ladies-J0MG8G.jpg)
BIEL, SWITZERLAND - APRIL 13 : Timea Bacsinszky in action at the 2017 Ladies Open Biel WTA International tennis tournament Stock Photo - Alamy
![Switzerland's Stanislas Wawrinka celebrates after beating Croatia's Ivan Ljubicic at the Swiss Indoors ATP tennis tournament in Basel November 4, 2009. REUTERS/Christian Hartmann (SWITZERLAND SPORT TENNIS Stock Photo - Alamy Switzerland's Stanislas Wawrinka celebrates after beating Croatia's Ivan Ljubicic at the Swiss Indoors ATP tennis tournament in Basel November 4, 2009. REUTERS/Christian Hartmann (SWITZERLAND SPORT TENNIS Stock Photo - Alamy](https://c8.alamy.com/comp/2E7NY2F/switzerlands-stanislas-wawrinka-celebrates-after-beating-croatias-ivan-ljubicic-at-the-swiss-indoors-atp-tennis-tournament-in-basel-november-4-2009-reuterschristian-hartmann-switzerland-sport-tennis-2E7NY2F.jpg)
Switzerland's Stanislas Wawrinka celebrates after beating Croatia's Ivan Ljubicic at the Swiss Indoors ATP tennis tournament in Basel November 4, 2009. REUTERS/Christian Hartmann (SWITZERLAND SPORT TENNIS Stock Photo - Alamy
![Switzerland's Stanislas Wawrinka celebrates after beating Finland's Jarkko Nieminen at the Swiss Indoors ATP tennis tournament in Basel November 5, 2009. REUTERS/Christian Hartmann (SWITZERLAND SPORT TENNIS Stock Photo - Alamy Switzerland's Stanislas Wawrinka celebrates after beating Finland's Jarkko Nieminen at the Swiss Indoors ATP tennis tournament in Basel November 5, 2009. REUTERS/Christian Hartmann (SWITZERLAND SPORT TENNIS Stock Photo - Alamy](https://c8.alamy.com/comp/2E8GWJ7/switzerlands-stanislas-wawrinka-celebrates-after-beating-finlands-jarkko-nieminen-at-the-swiss-indoors-atp-tennis-tournament-in-basel-november-5-2009-reuterschristian-hartmann-switzerland-sport-tennis-2E8GWJ7.jpg)
Switzerland's Stanislas Wawrinka celebrates after beating Finland's Jarkko Nieminen at the Swiss Indoors ATP tennis tournament in Basel November 5, 2009. REUTERS/Christian Hartmann (SWITZERLAND SPORT TENNIS Stock Photo - Alamy
![John Isner of the U.S. serves to Switzerland's Roger Federer during their Davis Cup tennis match in Fribourg, February 10, 2012. REUTERS/Michael Buholzer (SWITZERLAND - Tags: SPORT TENNIS Stock Photo - Alamy John Isner of the U.S. serves to Switzerland's Roger Federer during their Davis Cup tennis match in Fribourg, February 10, 2012. REUTERS/Michael Buholzer (SWITZERLAND - Tags: SPORT TENNIS Stock Photo - Alamy](https://c8.alamy.com/comp/2E64GDF/john-isner-of-the-us-serves-to-switzerlands-roger-federer-during-their-davis-cup-tennis-match-in-fribourg-february-10-2012-reutersmichael-buholzer-switzerland-tags-sport-tennis-2E64GDF.jpg)
John Isner of the U.S. serves to Switzerland's Roger Federer during their Davis Cup tennis match in Fribourg, February 10, 2012. REUTERS/Michael Buholzer (SWITZERLAND - Tags: SPORT TENNIS Stock Photo - Alamy
![Switzerland's Davis Cup team member Roger Federer hits a return to Stanislas Wawrinka during a practice session in Fribourg, February 8, 2012. Switzerland will meet the U.S. in the Davis Cup tennis Switzerland's Davis Cup team member Roger Federer hits a return to Stanislas Wawrinka during a practice session in Fribourg, February 8, 2012. Switzerland will meet the U.S. in the Davis Cup tennis](https://c8.alamy.com/comp/2E6E73C/switzerlands-davis-cup-team-member-roger-federer-hits-a-return-to-stanislas-wawrinka-during-a-practice-session-in-fribourg-february-8-2012-switzerland-will-meet-the-us-in-the-davis-cup-tennis-tournament-on-february-10-12-reutersmichael-buholzer-switzerland-tags-sport-tennis-2E6E73C.jpg)