Osaka after calmer Aussie Open mindset

By Oliver Caffrey
Updated January 22 2020 - 4:43pm, first published 4:37pm
Defending champion Naomi Osaka is through to the Australian Open second round.
Defending champion Naomi Osaka is through to the Australian Open second round.

Fresh off a second-round tantrum, defending Australian Open champion Naomi Osaka concedes she needs to stay calmer on court.