Djokovic beats Zverev, into Australian semifinals

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

MELBOURNE, Australia — Novak Djokovic smashed a racket, sending a piece of the frame flying. Later, he plopped himself down right there at the back of the blue court, looking forlorn as can be.