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HALLE, GERMANY - JUNE 19: Philipp Kohlschreiber of Germany plays a volley shot during his match against Joao Sousa of Portugal on Day 3 of the Gerry Weber Open 2017 at on June 19, 2017 in Halle, Germany. (Photo by Lars Baron/Bongarts/Getty Images)

HALLE, GERMANY - JUNE 19: Philipp Kohlschreiber of Germany plays a volley shot during his match against Joao Sousa of Portugal on Day 3 of the Gerry Weber Open 2017 at  on June 19, 2017 in Halle, Germany.  (Photo by Lars Baron/Bongarts/Getty Images)