NEW YORK, NEW YORK - SEPTEMBER 06: Novak Djokovic of Serbia tends to a line judge who was hit with the ball during his Men's Singles fourth round match against Pablo Carreno Busta of Spain on Day Seven of the 2020 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2020 in the Queens borough of New York City. Al Bello/Getty Images/AFP
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