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.
Norway edge Ivory Coast to advance at World Cup
Erling Haaland shattered Ivory Coast's World Cup hopes on Tuesday, netting an 86th-minute winner that sent Norway into the last 16 with a 2-1 victory at Dallas Stadium.
Australia knock West Indies out to reach Women's T20 World Cup final
Australia moved a step closer to a record-extending seventh Women's T20 World Cup title after beating West Indies by eight wickets in the first semi-final at The Oval on Tuesday.
Swiatek struggles to Wimbledon first-round victory, Svitolina crashes out
Defending champion Iga Swiatek overcame a serious second-set wobble to reach the second round at Wimbledon on Tuesday, beating powerful American Taylor Townsend 6-1 2-6 6-3.
Anisimova and Paolini make winning return to Wimbledon
Last year's Wimbledon runner-up Amanda Anisimova made a winning return to the Grand Slam with a 6-3 6-2 win over qualifier Lina Gjorcheska to reach the second round on Tuesday.
Zimbabwe win test against Bangladesh in three days
Zimbabwe won their one-off home test against Bangladesh in three days as they skittled the tourists out on Tuesday to win by an innings and 85 runs for their biggest test victory.
