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

While tennis fans know who Novak Djokovic is, not many realize he married his highschool sweetheart after they began dating since 2005.

Novak Djokovic retired injured after losing a gruelling first set of his Australian Open semifinal to Alexander Zverev, leaving his bid for a record 25th Grand Slam crown in tatters on Friday.

Spectators booed an injured Novak Djokovic as he left the court in Rod Laver Arena after quitting one set into his Australian Open semifinal against Alexander Zverev

A tennis master is forced to depart an Australian Open semifinal with an injury, riling some in the crowd. At 37, it may be harder than ever to bounce back.

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

Novak Djokovic’s bid for an 11th Australian Open title ended abruptly on Friday (January 24th). Hoping for a record 25th Grand Slam title, the Serbian veteran left off a tiresome 80-minute Rod Laver Arena first set 7-6 (7-5).

Alexander Zverev asked the Melbourne crowd not to boo Novak Djokovic after the latter retired hurt, conceding the Australian Open semi-final to the German.

Alexander Zverev of Germany reacts after winning the first set during his semifinal match against Novak Djokovic of Serbia at the Australian Open tennis championship in Melbourne, Australia ...

Novak Djokovic and Andy Murray haven't decided whether ... Friday after losing the first set to No. 2 Alexander Zverev of Germany in a tiebreaker. Both Djokovic and Murray, a three-time Grand ...

Novak Djokovic and Aryna Sabalenka will step up their bids for ... Second seed Alexander Zverev of Germany is seeking a maiden Grand Slam title and has enjoyed two days off since his straight-sets win on Sunday night against Lucas Pouille.