Mikhail Kukushkin Pictures
NEW YORK, NY - SEPTEMBER 01: Mikhail Kukushkin of Kazakhstan reacts during his men's singles third round match against John Millman of Australia on Day Six of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)