CINCINNATI, OH - AUGUST 16: Alexander Zverev (GER) hits a forehand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Frances Tiafoe (USA) hits a backhand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Angelique Kerber (GER) prepares to serve during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Angelique Kerber (GER) hits a forehand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Angelique Kerber (GER) hits a forehand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Ekaterina Makarova (RUS) hits a forehand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Ekaterina Makarova (RUS) reacts to a point during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Richard Gasquet (FRA) hits a forehand volley during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Richard Gasquet (FRA) hits a backhand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Richard Gasquet (FRA) hits a backhand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Rafael Nadal (ESP) hits a forehand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Rafael Nadal (ESP) hits a forehand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Rafael Nadal (ESP) reacts to a point during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Rafael Nadal (ESP) hits a forehand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Rafael Nadal (ESP) hits a backhand during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)
CINCINNATI, OH - AUGUST 16: Rafael Nadal (ESP) celebrates a victory during the Western & Southern Open at the Lindner Family Tennis Center in Mason, Ohio on August 16, 2017.(Photo by George Walker/Icon Sportswire)

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