NEWPORT, R.I. — Second-seeded Ivo Karlovic advanced to the semifinals at the Hall of Fame Tennis Championships for the second straight year, beating Germany's Dustin Brown 7-6 (3), 6-3 on Friday.
The 36-year-old Karlovic, from Croatia, was a runner-up to Leyton Hewitt last year.
Coming off a reaching the round of 16 at Wimbledon, the 6-foot-11, hard-serving Karlovic had 23 aces, ending the match with one down the middle at 133 mph.
Karlovic will face No. 4 seeded Jack Sock, from the U.S., after he advanced when qualifier Jan Hernych, of the Czech Republic, retired with an injury in the second game.