KEY BISCAYNE, FL - APRIL 03: Andy Murray of Great Britain argues with the chair umpire during his match against Tomas Berdych of the Czech Republic during day 12 of the Miami Open at Crandon Park Tennis Center on April 3, 2015 in Key Biscayne, Florida. Al Bello,Image: 236530266, License: Rights-managed, Restrictions: , Model Release: no

Defending men's champion Serbia's Novak Djokovic practices on Margaret Court Arena ahead of the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 13, 2022. AP Photo/Mark Baker)