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MADRID, SPAIN - MAY 12: Denis Shapovalov of Canada in action against Alexander Zverev of Germany in their semifinal match during day eight of Mutua Madrid Open at La Caja Magica on May 12, 2018 in Madrid, Spain. (Photo by Denis Doyle/Getty Images)

MADRID, SPAIN - MAY 12:  Denis Shapovalov of Canada in action against Alexander Zverev of Germany in their semifinal match during day eight of Mutua Madrid Open at La Caja Magica on May 12, 2018 in Madrid, Spain. (Photo by Denis Doyle/Getty Images)