A 6'10" Croat named Ivo Karlovic broke Andy Roddick's fastest-serve record in the fourth set of a Davis Cup doubles match yesterday. In 2004, Roddick's yellow ball traveled 155 mph (or 249.5 km/h); Karlovic's went 155.96 mph (or 251 km/h).

Karlovic, who is tennis's tallest player per his website, and his partner lost the match to a pair of Germans.

Big-hitting Karlovic serves up new world record [Times of India]

(H/T Daily Picks and Flicks)