NEW YORK, Sept. 4 (UPI) -- Third-seeded Andy Murray continued his quest to defend his U.S. Open championship Tuesday by knocking off Denis Istomin in four tough sets.
Murray, who already won a Grand Slam title at Wimbledon this year, improved to 17-1 in Grand Slam matches this season by battling to a 6-7 (5-7), 6-1, 6-4, 6-4 win over Uzbekistan's Istomin.