Best Moments from the U.S. Open 2017 QuarterfinalsHighlights from two days of quarterfinals action at the 2017 U.S. Open, where Rafael Nadal, Venus Williams, CoCo Vandeweghe, Sloane Stephens and more advanced to the semifinals. Author:SI StaffPublish date:Sep 6, 2017Best Moments from the U.S. Open 2017 Quarterfinals Rafael NadalMohammed Elshamy/Anadolu Agency/Getty Images Andrey Rublev JEWEL SAMAD/AFP/Getty Images Rafael Nadal JEWEL SAMAD/AFP/Getty Images Rafael Nadal JEWEL SAMAD/AFP/Getty Images Rafael Nadal JEWEL SAMAD/AFP/Getty Images Rafael Nadal JEWEL SAMAD/AFP/Getty Images Rafael Nadal JEWEL SAMAD/AFP/Getty Images Andrey RublevTIMOTHY A. CLARY/AFP/Getty Images Rafael Nadal JEWEL SAMAD/AFP/Getty Images CoCo VandewegheClive Brunskill/Getty Images CoCo VandewegheClive Brunskill/Getty Images CoCo VandewegheAbbie Parr/Getty Images Karolina PliskovaAl Bello/Getty Images CoCo VandewegheTIMOTHY A. CLARY/AFP/Getty Images Karolina Pliskova JEWEL SAMAD/AFP/Getty Images Petra KvitovaDON EMMERT/AFP/Getty Images Venus WilliamsDON EMMERT/AFP/Getty Images Petra KvitovaVolkan Furuncu/Anadolu Agency/Getty Images Venus WilliamsElsa/Getty Images Venus Williams JEWEL SAMAD/AFP/Getty Images Petra KvitovaElsa/Getty Images Petra KvitovaMatthew Stockman/Getty Images Venus WilliamsMatthew Stockman/Getty Images Pablo Carreno BustaChaz Niell/Icon Sportswire via Getty Images Pablo Carreno BustaAbbie Parr/Getty Images Pablo Carreno BustaAbbie Parr/Getty Images Pablo Carreno Busta Al Bello/Getty Images Pablo Carreno BustaElsa/Getty Images Diego SchwartzmanChaz Niell/Icon Sportswire via Getty Images Sloane StephensTim Clayton/Corbis via Getty Images Sloane StephensTim Clayton/Corbis via Getty Images Anastasija SevastovaTim Clayton/Corbis via Getty Images Sloane StephensTim Clayton/Corbis via Getty Images Anastasija SevastovaTim Clayton/Corbis via Getty Images Sloane StephensElsa/Getty Images Sam QuerreyElsa/Getty Images Kevin AndersonMatthew Stockman/Getty Images Sam QuerreyElsa/Getty Images Kevin AndersonElsa/Getty Images Madison KeysDON EMMERT/AFP/Getty Images Madison KeysJEWEL SAMAD/AFP/Getty Images Madison KeysClive Brunskill/Getty Images Madison Keys DON EMMERT/AFP/Getty Images Kaia KanepiJEWEL SAMAD/AFP/Getty Images Kaia KanepiClive Brunskill/Getty Images Juan Martin del PotroClive Brunskill/Getty Images Juan Martin del PotroClive Brunskill/Getty Images Roger Federer, Juan Martin del PotroClive Brunskill/Getty Images Roger FedererMohammed Elshamy/Anadolu Agency/Getty Images Roger FedererClive Brunskill/Getty Images Roger FedererClive Brunskill/Getty Images Juan Martin del PotroClive Brunskill/Getty Images Juan Martin del PotroAl Bello/Getty Images Roger FedererClive Brunskill/Getty Images Roger FedererMohammed Elshamy/Anadolu Agency/Getty ImagesLatest NewsNovak Djokovic Suffers Unexpected Defeat in Indian Wells vs. 20-Year-Old Luca NardiTennis Q&A: Anti-Doping Lawyer Howard Jacobs on Simona Halep’s CaseRafael Nadal Withdraws From Indian Wells Before Playing in First RoundMailbag: The Aftermath of Andrey Rublev’s On-Court Outburst and DefaultSimona Halep’s Ban Reduced: What It Means for Tennis’s Anti-Doping Policy