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.

Novak Djokovic responds to boos as Jannik Sinner to face Alexander Zverev in Australian Open final - live - Djokovic is out ...

Novak Djokovic retired injured after losing a gruelling first set of his Australian Open semifinal to Alexander Zverev, ...

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Novak Djokovic and Andy Murray haven't decided whether to continue their player-coach partnership. Djokovic hired his former ...

Novak Djokovic retires from his Australian Open semifinal after losing the first set against Alexander Zverev.

It could be tempting to write off Novak Djokovic at this point, to think he might be closer than ever to being done competing ...