Russia's Maria Sharapova plays a forehand return during her women's singles match against Lauren Davis of the US on day five of the 2016 Australian Open tennis tournament in Melbourne on January 22, 2016. AFP PHOTO / GREG WOOD-- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE / AFP / GREG WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)

Russia's Maria Sharapova plays a forehand return during her women's singles match against Lauren Davis of the US on day five of the 2016 Australian Open tennis tournament in Melbourne on January 22, 2016. AFP PHOTO / GREG WOOD-- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE / AFP / GREG WOOD        (Photo credit should read GREG WOOD/AFP/Getty Images)