Jo-Wilfried Tsonga beat American Jack Sock in four sets to reach the U.S. Open quarterfinals for the second straight year. After failing to covert one match point in the third-set tiebreaker, the ninth-seeded Tsonga dominated the fourth for the 6-3, 6-3, 6-7 (7), 6-2 victory Sunday. Sock, the last man from the United States left in the draw, was trying to reach his first major quarterfinal. No American man has made the last eight at the U.S. Open since 2011. The 26th-seeded Sock upset 2014 U.S. Open champ Marin Cilic in the third round, never facing a break point. But on Sunday, he had just five aces and was broken six times. The U.S. Open is the only major at which Tsonga, the 2008 Australian Open runner-up, has not reached at least the semifinals. Tsonga could next face top-ranked Novak Djokovic, who faces 21-year-old Kyle Edmund later Sunday. Asked what kind match he hoped for between those two, Tsonga joked, “really, really, really long.”
Caroline Wozniacki eliminated eighth-seeded American Madison Keys 6-3, 6-4 Sunday to reach the U.S. Open quarterfinals, her deepest run at a Grand Slam tournament in two years. Wozniacki is a two-time runner-up at Flushing Meadows, but she is unseeded and ranked only 74th after a season filled with injuries and poor results. She hadn’t won a match at a major in 2016 until arriving in New York. She lost U.S. Open finals in 2009 against Kim Clijsters and 2014 against Serena Williams. On Sunday, Wozniacki made only seven unforced errors, 26 fewer than Keys.