Japan’s Kei Nishikori in action against France’s Jeremy Chardy during their second round match at the BNP Paribas 2015 Masters tennis tournament in Paris, France, 04 November 2015. EPA/ETIENNE LAURENT

A young fan of Spain’s Rafael Nadal walks down the stairs during a break of the second round match between Nadal and Czech Republic’s Lukas Rosol at the BNP Paribas 2015 Masters tennis tournament in Paris, France, 04 November 2015. EPA/ETIENNE LAURENT

France’s Richard Gasquet in action against Argentina’s Leonardo Mayer during their second round match at the BNP Paribas 2015 Masters tennis tournament in Paris, France, 04 November 2015. EPA/ETIENNE LAURENT

Britain’s Andy Murray reacts during his second round match against Croatia’s Borna Coric at the BNP Paribas 2015 Masters tennis tournament in Paris, France, 04 November 2015. EPA/ETIENNE LAURENT

France’s Jeremy Chardy in action against Japan’s Kei Nishikori during their second round match at the BNP Paribas 2015 Masters tennis tournament in Paris, France, 04 November 2015. EPA/ETIENNE LAURENT