Smashing success: Djokovic beats Zverev, into Australian SF
Germany's Alexander Zverev hits a forehand return to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Germany's Alexander Zverev hits a forehand return to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Feb. 16, 2021 07:14 AM EST
Serbia's Novak Djokovic smashes his racket during his quarterfinal match against Germany's Alexander Zverev at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Serbia's Novak Djokovic smashes his racket during his quarterfinal match against Germany's Alexander Zverev at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Feb. 16, 2021 07:04 AM EST
Serbia's Novak Djokovic sits down at the back of the court between games during his quarterfinal against Germany's Alexander Zverev at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Serbia's Novak Djokovic sits down at the back of the court between games during his quarterfinal against Germany's Alexander Zverev at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Feb. 16, 2021 06:56 AM EST
A ball girl sweeps up debris after Serbia's Novak Djokovic smashed his racket during his quarterfinal against Germany's Alexander Zverev at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

A ball girl sweeps up debris after Serbia's Novak Djokovic smashed his racket during his quarterfinal against Germany's Alexander Zverev at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Feb. 16, 2021 07:10 AM EST
Germany's Alexander Zverev serves to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Hamish Blair)

Germany's Alexander Zverev serves to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Hamish Blair)

Feb. 16, 2021 07:30 AM EST
Germany's Alexander Zverev serves to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Germany's Alexander Zverev serves to Serbia's Novak Djokovic during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 16, 2021.(AP Photo/Andy Brownbill)

Feb. 16, 2021 08:03 AM EST