Level-headed Osaka thrives in spotlight

If US Open winner Naomi Osaka is feeling the pressure of being the newest Grand Slam champion, she's hiding it well heading into the Australian Open.

The Japanese star arrives in Melbourne as the world No 4 after a stunning victory over Serena Williams at Flushing Meadows that sent the 21-year-old's profile into the stratosphere.

The manner in which she claimed her first Slam was far from ideal - with Serena's furious tirade against the umpire overshadowing Osaka's breakthrough moment.