http://media.www.redandblack.com/media/storage/paper871/news/2008/01/16/Sports/Titans.Tower.Over.Competition-3153780.shtml Karlovic Stats] 153mph serve He also hit a 144 mph second serve against Paul Capdeville in the quarterfinals of the 2007 Legg Mason Tennis Classic on 3 August, which is the fastest second serve on record.