Novak Djokovic retires from Australian Open semi-final as Alexander Zverev advances - live
Novak Djokovic retires from Australian Open semi-final as Alexander Zverev advances - live - Djokovic is out of the ...
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Novak Djokovic vs. Alexander Zverev LIVE score, updates, commentary from Australian Open semi-finals
It's the blockbuster semi-final of the Australian Open - Novak Djokovic and Alexander Zverev at Rod Laver Arena on a Friday afternoon.