2018 US Open - Day 12

In This Photo: Novak Djokovic
Novak Djokovic of Serbia reacts his men's singles semi-final match against Kei Nishikori of Japan on Day Twelve of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 7, 2018 in the Flushing neighborhood of the Queens borough of New York City.
(Sept. 6, 2018 - Source: Julian Finney/Getty Images North America)