It could be tempting to write off Novak Djokovic in the immediate aftermath of his exit from the Australian Open semifinals with a torn leg muscle.

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 has reached the third round of this year's Australian Open with his bid to become the first player to win 25 Grand Slam titles remaining on track