MELBOURNE, AUSTRALIA - JANUARY 15: Alexander Zverev of Germany in action during day two of the 2019 Australian Open at Melbourne Park on January 15, 2019 in Melbourne, Australia. (Photo by James D. Morgan/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 15: Alexander Zverev of Germany in action during day two of the 2019 Australian Open at Melbourne Park on January 15, 2019 in Melbourne, Australia. (Photo by James D. Morgan/Getty Images)