Garbine Muguruza of Spain in action against Beatriz Haddad Maia of Brazil during their second round match of the Western & Southern Open at the Linder Family Tennis Center in Mason, Ohio, USA, 15 August 2017. EPA/TANNEN MAURY
Madison Keys of the US in action against Daria Kasatkina of Russia during their match in the Western & Southern Open at the Linder Family Tennis Center in Mason, Ohio, 16 August 2017. EPA/TANNEN MAURY
Simona Halep of Romania in action against Taylor Townsend of the US during their first round match in the Western & Southern Open at the Linder Family Tennis Center in Mason, Ohio, 15 August 2017. EPA/TANNEN MAURY
Taylor Townsend of the US in action against Simona Halep of Romania in their first round match in the Western & Southern Open at the Linder Family Tennis Center in Mason, Ohio, 15 August 2017. EPA/TANNEN MAURY
Sloane Stephens of the US in action against Lucie Safarova of the Czech Republic in their first round match in the Western & Southern Open tennis tournament at the Linder Family Tennis Center in Mason, Ohio, USA, 15 August 2017. EPA/TANNEN MAURY
Lucie Safarova of the Czech Republic serves against Sloane Stephens of the US in their first round match in the Western & Southern Open tennis tournament at the Linder Family Tennis Center in Mason, Ohio, USA, 15 August 2017. EPA/TANNEN MAURY