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MELBOURNE, AUSTRALIA - JANUARY 20: Philipp Kohlschreiber of Germany plays a forehand in his Men's Singles first round match against Marcos Giron of the United States on day one of the 2020 Australian Open at Melbourne Park on January 20, 2020 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 20: Philipp Kohlschreiber of Germany plays a forehand in his Men's Singles first round match against Marcos Giron of the United States on day one of the 2020 Australian Open at Melbourne Park on January 20, 2020 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)