Australian Open: Naomi Osaka overcomes stiff challenge to start title defence with win

Australian Open: Naomi Osaka started her title defence in Melbourne with an unexpectedly difficult 6-3, 6-3 win over Colombian Camila Osorio, having to save two break points to hold serve for the first set and faced two more in the second.

Defending champion Naomi Osaka overcame an unexpectedly stiff challenge from Colombian Camila Osorio to reach the second round of the Australian Open 6-3 6-3 on Rod Laver Arena on Monday.

The Japanese former world number one looked all business as she raced to a 5-0 lead in the opening set but a first hold of serve invigorated Osorio, who then started chasing down everything Osaka threw at her.