2019 U.S. Open: Highlights From Friday. United States Open (Tennis), Tennis, Djokovic, Novak, Evans, Daniel (1990- ), Federer, Roger, Kudla, Denis (1992- ), Medvedev, Daniil (1996- ), Muchova, Karolina (1996- ), Nishikori, Kei, de Minaur, Alex  (1999- ), Williams, Serena, Gauff, Cori (2004- ), McNally, Caty (2001- )