Novak Djokovic, Australian Open and Alexander Zverev

Jannik Sinner has been on a roll lately, the Italian has emerged all of a sudden and won three Grand Slams out of nowhere.
Alexander Zverev chided the crowd after they booed Novak Djokovic for retiring due to injury after the first set in an ...
Alexander Zverev urges fans not to boo Novak Djokovic, who retired in the Australian Open Semifinals due to injury ...
Spectators booed as the 37-year-old Djokovic walked off toward the locker room, and he stopped, turned around and responded ...
Injured Djokovic decides not to continue after losing first set as Zverev reaches his first Australian Open final ...