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MUNICH, GERMANY - MAY 02: Martin Klizan of Slovakia plays a fore hand during his 2nd round matach against Mirza Basic of Bosnia and Herzegovina on day 5 of the BMW Open by FWU at MTTC IPHITOS on May 2, 2018 in Munich, Germany. (Photo by Alexander Hassenstein/Getty Images)

MUNICH, GERMANY - MAY 02:  Martin Klizan of Slovakia plays a fore hand during his 2nd round matach against Mirza Basic of Bosnia and Herzegovina on day 5 of the BMW Open by FWU at MTTC IPHITOS on May 2, 2018 in Munich, Germany.  (Photo by Alexander Hassenstein/Getty Images)