NEW YORK, NY - SEPTEMBER 01: Marin Cilic of Croatia returns the ball during the men's singles third round match against Aled de Minaur 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 Julian Finney/Getty Images)
