Reported by Fox News Houston, TX – John Isner posted a quarterfinal victory against defending champion Ryan Sweeting on Friday at the U.S. Men’s Clay Court Championship. The No. 2 seed Isner won two tiebreakers to take a 7-6 (7-1), 7-6 (7-4) win over Sweeting in an All-American confrontation at River Oaks Country Club. Isner [...]