NEW YORK, NEW YORK - AUGUST 28: Novak Djokovic (left) of Serbia shakes hands with Alexandre Muller of France after defeating him during their Men's Singles First Round match on Day One of the 2023 US Open at the USTA Billie Jean King National Tennis Center on August 28, 2023 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)