Two weeks before the Australian Open, Ivo Karlovic showed that miles per hour can make up for miles on the odometer. The 35-year-old owns one of tennis’ fastest serves, a shot nearly impossible ...

Ivo Karlovic capable of sending bombs while finding excellent angles. He holds the ace record in a two-set match: 44! As well as a very good serve, he was also very good at the net.” ...

Isner hit a 149 mph serve at the 2011 Cincinnati Masters event. Ivo Karlovic owns the fastest recorded serve at 156 mph, but he hit that blast during a Davis Cup tie, which is an ITF event.