Serena Williams of the US returms against Russia's Margarita Gasparyan during their women's singles game on day seven of the 2015 Australian Open tennis tournament in Melbourne on January 24, 2016. AFP PHOTO / PAUL CROCK-- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE / AFP / PAUL CROCK        (Photo credit should read PAUL CROCK/AFP/Getty Images)