He finished his career with 13,728 aces, second behind John Isner with 14,470. Karlovic has the most aces in a best-of-three-set match with 45 at Halle in 2015, and two weeks later at Wimbledon he ...

Next time you see Miami Open champion John Isner play, watch out for his habit of bouncing the ball between his legs before serving.

Isner hit 112, Mahut 103. The previous record had been 78 by Ivo Karlovic 183: Total games played. That’s 71 more than the second-highest total at Wimbledon, in Pancho Gonzalez’s five set win ...

While the match did not go quite as long as the 2010 Wimbledon classic between John Isner and Nicolas Mahut, which took 11 hours and five minutes to finish at 70-68 in the fifth set, Karlovic’s ...

DELRAY BEACH, Fla. (AP) -- At 6-foot-11, Ivo Karlovic, has served his way out of plenty of predicaments. On Sunday, the tallest tennis professional player on record did so again, hitting 13 aces ...

The other quarterfinal matchups have No. 2 seed John Isner facing fellow American Donald Young and Ryan Harrison taking on Damir Dzumhur. Karlovic's loss leaves Isner and Johnson as the only seeds ...

Essentially, the scoreboard resets to zero, and with a big server like Roddick, Isner or Karlovic at the other end, one mistake on your own serve can be terminal. And Nadal didn't serve well hims ...

The men's record in any singles is 113 aces, by John Isner in his marathon Wimbledon win in 2010 over Nicolas Mahut, who hit 103. Karlovic will next play the top-seeded Federer, who won 6-0 ...

DUESSELDORF, Germany (AP) -- Top-seeded Philipp Kohlschreiber claimed his fifth ATP World Tour trophy by defeating Ivo Karlovic of Croatia 6-2, 7-6 (4) in the Duesseldorf Open final on Saturday.