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.
UEFA, AFC, CONCACAF hit out at Infantino over World Cup stake sale
European football's governing body UEFA, the Asian Football Confederation and CONCACAF issued an open letter on Monday attacking FIFA chief Gianni Infantino's conduct during the proposed sale of a stake in World Cup commercial rights.
Malawi book first-ever place at Women's World Cup
Malawi has continued its fairytale debut at the Women’s Africa Cup of Nations, coming from behind to beat Ghana 2-1 in Sunday’s last quarter-final, which also secured them a spot in the World Cup for the first time.
All Blacks lose Proctor to fractured shoulder on South Africa tour
New Zealand centre Billy Proctor will return home from his side's tour of South Africa after scans revealed a fractured shoulder sustained in the 38-21 victory over the Stormers in Cape Town on Friday.
Sinner withdraws from Cincinnati Open with knee injury
World number one Jannik Sinner has pulled out of the Cincinnati Open with a right knee injury, tournament organisers said on Sunday, handing the Italian a blow in his preparations for this month's US Open.
Khan replaces Sudharsan in India's squad for Sri Lanka tests
India batter Sai Sudharsan has been ruled out of the test series against Sri Lanka due to a toe injury, the Board of Control for Cricket in India (BCCI) said on Sunday.
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