Tennis

Day 5 at the US Open

Published 2217 GMT (0617 HKT) September 2, 2016
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Roberta VinciRoberta Vinci
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Roberta Vinci moved a step closer to another final at the US Open by beating Carina Witthoeft. JEWEL SAMAD/AFP/AFP/Getty Images
Vinci, who stunned Serena Williams last year, won 6-0 5-7 6-3 to reach round four. Al Bello/Getty Images North America/Getty Images
Comeback of the day went to Madison Keys. She trailed 5-1 in the third before defeating Naomi Osaka 7-5 4-6 7-6 (7-3). TIMOTHY A. CLARY/AFP/AFP/Getty Images
Two-time US Open finalist Caroline Wozniacki -- who meets Keys next -- followed up her upset win over Svetlana Kuznetsova by defeating Monica Niculescu 6-3 6-1. Elsa/Getty Images North America/Getty Images
Novak Djokovic got more good luck when his opponent, Mikhail Youzhny, retired trailing 4-2 in the first set. Elsa/Getty Images North America/Getty Images
Djokovic -- the world No. 1 -- didn't have to play in the second round because of an injury to opponent Jiri Vesely. Al Bello/Getty Images North America/Getty Images
Jack Sock took out 2014 winner Marin Cilic 6-4 6-3 6-3, two weeks after Cilic won the prestigious Cincinnati Masters. JEWEL SAMAD/AFP/AFP/Getty Images
Jo-Wilfried Tsonga moved on by winning against an ailing Kevin Anderson 6-3 6-4 7-6 (7-4). Anderson upset Andy Murray last year in New York. Al Bello/Getty Images North America/Getty Images