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HANOVER, GERMANY - MARCH 04: Philipp Kohlschreiber of Germany plays a backhand in his match against Lukas Rosol of Czech Republic during Day 1 of the Davis Cup World Group first round between Germany and Czech Republic at TUI Arena on March 4, 2016 in Hanover, Germany. (Photo by Oliver Hardt/Bongarts/Getty Images)

HANOVER, GERMANY - MARCH 04:  Philipp Kohlschreiber of Germany plays a backhand in his match against Lukas Rosol of Czech Republic during Day 1 of the Davis Cup World Group first round between Germany and Czech Republic at TUI Arena on March 4, 2016 in Hanover, Germany.  (Photo by Oliver Hardt/Bongarts/Getty Images)