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Feliciano López of Spain hits a return to Alex De Minaur of Australia in their men's singles quarter-final match at the Sydney International tennis tournament in Sydney on January 11, 2018. / AFP PHOTO / PETER PARKS / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE -- (Photo credit should read PETER PARKS/AFP/Getty Images)

Feliciano López of Spain hits a return to Alex De Minaur of Australia in their men's singles quarter-final match at the Sydney International tennis tournament in Sydney on January 11, 2018. / AFP PHOTO / PETER PARKS / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --        (Photo credit should read PETER PARKS/AFP/Getty Images)