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Waving the Open flag

Sloane Stephens advanced to the third round with a late-night win over Urszula Radwanska. She takes on fellow American Jamie Hampton next. Emmanuel Dunand/AFP/Getty Images

Since the U.S. Championships began in 1881, there have been only seven occasions when an American failed to reach either the men’s or women’s singles final: 1959, 1973, 1988, 2004, 2007, 2009 and 2010. Overall, there have been 28 all-international men's singles finals (including 16 in the Open Era) and 16 all-international women's singles finals (including 13 in the Open Era). Heading into Day 4 at Flushing Meadows, there were eight men remaining in the men’s singles draw -- Tim Smyczek, Rajeev Ram, Donald Young, Denis Kudla, Bradley Klahn, Jack Sock, 26th-seeded Sam Querrey and 13th-seeded John Isner – and eight women remaining in the singles draw – top-seeded Serena Williams, 15th-seeded Sloane Stephens, Christina McHale, Jamie Hampton, Bethanie Mattek-Sands, Alison Riske, Sachia Vickery and Victoria Duval.