2016 Australian Open Women's Singles Third Round - Maria Sharapova claim the 600th victory of her 15-year career beating American Lauren Davis to reach the last 16 at the Australian Open

Former champion Maria Sharapova needed three sets to beat unseeded American Lauren Davis and reach the last 16 at the Australian Open.

The Russian fifth seed won 6-1 6-7 (5-7) 6-0 under the Rod Laver Arena roof, as rain halted play on outside courts.

It took two hours and 14 minutes for the five-time Grand Slam champion to see off Davis, the world number 103, and claim the 600th victory of her 15-year career.

"Wow. I've won 600 matches?" said the 28-year-old. "Is this like a friendly reminder that I'm getting old? Might be."

Maria Sharapova of Russia is presented with a cake by Australian Open Tournament Director Craig Tiley to commemorate her 600th career singles win during day five of the 2016 Australian Open in Melbourne on Friday January 22,2016

Maria Sharapova is the 17th player to achieve 600 match wins and fourth active to do so, joining Venus Williams, Serena Williams and Jelena Jankovic