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Varvara Lepchenko of the US plays a forehand return during her women's singles match against Spain's Lara Arruabarrena 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/Getty Images)

Varvara Lepchenko of the US plays a forehand return during her women's singles match against Spain's Lara Arruabarrena 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/Getty Images)