Ivo Karlović: ultimate first serve

Ivo Karlović born 28 February 1979, Zagreb is a Croatian tennis player. He has won six ATP singles titles: three in 2007, one in 2008, one in 2013 and one in 2015. Karlović is the tallest player ever on the ATP Tour at 211 cm (6 ft 11 in). He is a serve-and-volleyer and officially held the record for the fastest serve recorded in professional tennis, measured at 251 km/h (156 mph), before being surpassed by Samuel Groth in 2012. He is considered one of the best servers on tour. His height enables him to ser