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PARIS, FRANCE - NOVEMBER 01: Tomas Berdych of the Czech Republic hits backhand during his men's singles second round match against Joao Sousa of Portugal on day two of the BNP Paribas Masters at Palais Omnisports de Bercy on November 1, 2016 in Paris, France. (Photo by Dan Mullan/Getty Images)

PARIS, FRANCE - NOVEMBER 01:  Tomas Berdych of the Czech Republic hits backhand during his men's singles second round match against Joao Sousa of Portugal on day two of the BNP Paribas Masters at Palais Omnisports de Bercy on November 1, 2016 in Paris, France.  (Photo by Dan Mullan/Getty Images)