Of all the praise bestowed on Jannik Sinner after he won his second consecutive Australian Open championship, and third Grand Slam title overall, nothing felt as significant as the comparison made by runner-up Alexander Zverev.

Novak Djokovic has retired from his Australian Open semifinal against Alexander Zverev after losing the first set in a tiebreak. Djokovic missed a regulation putaway volley on top of the net down 5-6,

Novak Djokovic is 37 and was forced to stop playing because of an injury at two of the past four Grand Slam tournaments.

Novak Djokovic's bid for 11th Australian Open title ends after a muscle tear in his left leg. He says injury happened during match vs. Carlos Alcaraz.

Zverev will face defending Australian Open champion and No. 1 seed Jannik Sinner, who beat American Ben Shelton 7-6 (2), 6-2, 6-2, in Sunday's final. Zverev is pursuing his first major tournament title.

Former world number one Boris Becker has explained his comments about Novak Djokovic’s recent injury during the Australian Open. The 37-year-old is regarded as the greatest player in the history of men’s tennis in the singles category,

Novak Djokovic wrote a heartfelt message to Alexander Zverev on Instagram after his injury retirement in the Australian Open.

Novak Djokovic could miss a "couple months" with a torn hamstring and potentially return in time for the French Open in May, according to a report from ESPN’s Chris

Djokovic is out of the Australian Open after retiring from his semi-final, with Zverev through to face Sinner on Sunday

Djokovic is only interested in tennis' biggest prizes. He still has the game to win them, but at age 37 his body is letting him down

Alexander Zverev chided the crowd after they booed Novak Djokovic for retiring due to injury after the first set in an Australian Open semifinal.