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.
Liverpool eliminated as Atalanta book Europa League semi-final place
Atalanta progressed to the Europa League semi-finals despite losing 1-0 to Liverpool on Thursday as they triumphed 3-1 on aggregate to move one step closer to a first ever European final for the Serie A side.
Real Madrid knock out holders Man City in Champions League shootout
Antonio Ruediger scored the decisive penalty as Real Madrid beat holders Manchester City in an edge-of-your-seat 4-3 shootout victory to reach the semi-finals of the Champions League after the teams were locked at 4-4 on aggregate following extra time on Wednesday.
Kimmich heads Bayern Munich past Arsenal and into semi-finals
Bayern Munich's Joshua Kimmich powered in a 63rd-minute header to give them a 1-0 victory over a toothless Arsenal on Wednesday and send them through to the Champions League semi-finals for the first time in four years with a 3-2 aggregate win.
Nadal makes winning return in Barcelona
Rafael Nadal said it was a challenge to hold himself back on his return to the ATP Tour after three months on the sidelines but the fiercely-competitive Spaniard expects to continue with the controlled approach in Barcelona.
Mbappe scores twice as PSG beat 10-man Barca to reach semi-finals
Paris St Germain's Kylian Mbappe scored twice in the second half to help his side to a 4-1 comeback win at 10-man Barcelona in their Champions League quarter-final, second leg to wrap up a 6-4 aggregate victory on Tuesday.
