Barclays ATP World Tour Finals - Day Two [Getty Images]

LONDON, ENGLAND - NOVEMBER 10: Stanislas Wawrinka of Switzerland greets audience during the singles group A match tennis match against Tomas Berdych of the Czech Republic on the second day of the Barclays ATP World Tour Finals at the O2 Arena on November 10, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images)

Anadolu Agency Anadolu Agency