. . . that seriously doubts that Ivo Karlovic has the best serve on tour? If so, I'd like to hear why as I find it a bit strange. What I find pretty convincing is his % of service games won vs. great returners: Davydenko: 90%, three matches played Federer: 93%, ten matches played (most of them before the emergence of ********). Djokovic: 91%, two matches played Nalbandian: 87%, two matches played Murray: 77%, three matches played (I'd say this is a bit of an aberration) Nadal: 91%, two matches played Ferrer: 90%, one match played Hewitt: 90%, four matches played Agassi: 96%, one match played at the 2005 US Open (granted this was in 2005 but still, Agassi would go on to make the final so he obviously had some game, and was still a damn good returner). Del Potro: 100%, one match played Verdasco: 94%, four matches played So those eleven players have broken Karlovic 42/438 times, or 9.6% of the time. If you take Murray out of there, it's an 8.2% rate. He also has a 93% of service games won vs. Roddick and Soderling in 10 matches, although Roddick obviously doesn't have a great return and Soderling doesn't have the best defensive return. With all of this being said, it surprises me that some people may doubt that Karlovic has the best serve in the game.