NEWPORT, R.I. (AP) — John Isner continued winning tiebreakers and forced another tie after the match.
The two-time defending champion won the battle of the tallest players on the ATP tour, defeating Ivo Karlovic of Croatia 7-6 (3), 7-6 (3) on Friday to advance to the semifinals of the Hall of Fame Tennis Championships.
In the other quarterfinal match, No. 4 seed Lleyton Hewitt of Australia beat qualifier Jan Hernych of the Czech Republic 6-7 (3), 6-4, 6-2, setting up a rematch up of last year final when Isner captured the title in straight sets.
On Friday, Isner won his 13th straight match on Newport's grass courts and raised his mark to 13-0 in tiebreakers during the streak.
When it was over, Isner, listed at 6-foot-9, claimed his height is listed incorrectly by the ATP — short an inch, which would tie him with Karlovic as the tallest player ever on the tour.
"I'm 6-10," he said, drawing attention from an ATP media official assigned to the event. "That was like my college height. No one from the ATP busted out the measuring tape. They found it online or something."
He was then asked by a writer: "Do you want to be listed at 6-10?"
"Yeah, because that's what I am," he said. "I'm not trying to hide that. I was probably still growing in college."
The second-seeded Isner served 23 aces, including three in each of the tiebreaks. Karlovic had 14 aces, but double faulted on the match's final point.
Both players served over 70 percent in the match, most ranging between 120-130 mph. Neither broke in a game.