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INDIAN WELLS, CALIFORNIA - MARCH 15: Roger Federer of Switzerland plays a backhand against Hubert Hurkacz of Poland during their men's singles quarter final match on day twelve of the BNP Paribas Open at the Indian Wells Tennis Garden on March 15, 2019 in Indian Wells, California. (Photo by Clive Brunskill/Getty Images)

INDIAN WELLS, CALIFORNIA - MARCH 15: Roger Federer of Switzerland plays a backhand against Hubert Hurkacz of Poland during their men's singles quarter final match on day twelve of the BNP Paribas Open at the Indian Wells Tennis Garden  on March 15, 2019 in Indian Wells, California. (Photo by Clive Brunskill/Getty Images)