Czech Republic's Denisa Allertova plays a forehand return during her women's singles match against Germany's Sabine Lisicki on day four of the 2016 Australian Open tennis tournament in Melbourne on January 21, 2016. AFP PHOTO / GREG WOOD-- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE / AFP / GREG WOOD        (Photo credit should read GREG WOOD/AFP via Getty Images)