MELBOURNE, AUSTRALIA - JANUARY 19: Alexander Zverev of Germany hits a forehand to Alex Bolt of Australia during day six of the 2019 Australian Open at Melbourne Park on January 19, 2019 in Melbourne, Australia. (Photo by TPN/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 19: Alexander Zverev of Germany hits a forehand to Alex Bolt of Australia during day six of the 2019 Australian Open at Melbourne Park on January 19, 2019 in Melbourne, Australia. (Photo by TPN/Getty Images)