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MONTREAL, QC - AUGUST 07: Look on Kei Nishikori (JPN) during the ATP Coupe Rogers first round match on August 7, 2019 at IGA Stadium in Montréal, QC (Photo by David Kirouac/Icon Sportswire via Getty Images)

MONTREAL, QC - AUGUST 07: Look on Kei Nishikori (JPN) during the ATP Coupe Rogers first round match on August 7, 2019 at IGA Stadium in Montréal, QC (Photo by David Kirouac/Icon Sportswire via Getty Images)