Defending champion Novak Djokovic has progressed to the third round after defeating Japanese wildcard Tatsuma Ito in Melbourne.
The Serb, who won 6-1, 6-4, 6-2 in one hour and 35 minutes, will now face Yoshihito Nishioka, who had crushed British number one Dan Evans in straight sets.
Sixth seed Stefanos Tsitsipas also reached the third round after opponent Philipp Kohlschreiber withdrew injured.
He will face Canadian Milos Raonic or Cristian Garin of Chile in the third round.


Five-way tie at the top after Abu Dhabi HSBC Championship first round
India spin dominant T20 win over Australia
Rory McIlroy backs MENA Golf Tour as 'a really good thing' for region
Anisimova outlasts Swiatek at WTA Finals to join Rybakina in semis
City's Haaland haunts former club Dortmund, Foden nets two in 4-1 win
