MELBOURNE, Australia — 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 .

Andy Murray has told tennis coaches that it's far harder playing the sport than watching on from the sidelines after working with Novak Djokovic at the Australian Open. Djokovic made the semi-finals of the competition this winter but was forced to withdraw from his showdown with Alexander Zverev on Friday due to injury.

Novak Djokovic shut down his doubters who had argued that the 10-time Australian Open champion had faked his injury in the quarter-final and semi-final in the tournament. Djokovic posted an MRI of his left hamstring and asked the doubters to have a look at it.