Thai-Son Kwiatkowski Pictures
NEW YORK, NY - AUGUST 28: Thai-Son Kwiatkowski of the United States returns a shot against Mischa Zverev (not pictured) of Germany during their first round Men's Singles match on Day One during the 2017 US Open at the USTA Billie Jean King National Tennis Center on August 27, 2017 in the Queens borough of New York City. (Photo by Chris Trotman/Getty Images for USTA)