NEW YORK, NEW YORK – SEPTEMBER 01: Stefanos Tsitsipas of Greece shakes hands with Adrian Mannarino of France following his Men’s Singles second round match win on Day Three of the 2021 US Open at the Billie Jean King National Tennis Center on September 01, 2021 in the Flushing neighborhood of the Queens borough of New York City. Matthew Stockman/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==