see more

NEW YORK, NEW YORK - AUGUST 23: Kei Nishikori of Japan fields questions during a press conference at media day prior to the US Open at USTA Billie Jean King National Tennis Center on August 23, 2019 in New York City. (Photo by Matthew Stockman/Getty Images)

NEW YORK, NEW YORK - AUGUST 23: Kei Nishikori of Japan fields questions during a press conference at media day prior to the US Open at USTA Billie Jean King National Tennis Center on August 23, 2019 in New York City. (Photo by Matthew Stockman/Getty Images)