Maria Sharapova opens Twitter account

Russian tennis star Maria Sharapova is finally taking to Twitter after years of loyalty to rival social network Facebook.

Unsurprisingly, the first tweet of the World No. 2, who cruised into the second round of the Australian Open earlier Monday, was a commercial linked to her new line of candy.

"Your ultimate sugarmama has arrived #myfirsttweet," said the fashion icon, whose cover picture shows her glancing back from the wheel of a classic car.

An hour after her first tweet the 25-year-old Sharapova, sport's highest female earner in 2012, had racked up more than 7,600 followers.

Since 2010 Sharapova has been posting video and text updates on Facebook, where she has 9.2 million "likes."