Houston, TX (Sports Network) - Last year's runner-up John Isner was a hard-
fought second-round winner Thursday at the U.S. Men's Clay Court Championship.
The fifth-seeded 6-foot-9 Isner outlasted fellow American Jack Sock
7-5, 6-7 (3-7), 7-6 (7-3) in 2 1/2 hours. Isner lost to Argentine Juan Monaco
in last year's Houston finale.
Meanwhile, seventh-seeded Paolo Lorenzi topped fellow Italian Flavio Cipolla
7-6 (7-4), 6-1 and American wild card Rhyne Williams doused 6-foot-10 Croatian
lucky loser Ivo Karlovic 6-4, 6-7 (5-7), 7-6 (7-3). Karlovic, who clubbed 28
aces in a losing effort on Day 4 and was a titlist here in 2007, replaced
fourth-seeded American and 2010 runner-up Sam Querrey in the draw at River
Oaks Country Club.
Rain washed away four scheduled second-round matches here on Wednesday.
The 2013 Houston champ will collect $82,300.
The Sports Network