Tennis facts The longest tennis match in history was when John Isner served 113 aces in his historic win over Nicolas Mahut at the 2010 Wimbledon Championships! Ivo Karlovic from Croatia hit the fastest serve ever recorded in Men?s Tennis during a Davis Cup Tie in 2011. His serve was measured at 156 mph or 251 km/h. Previously Andy Roddick from the US held the record at 155 mph or 249 k. learn more at http://www.onlinetennisinstruction.com/tennisfacts.html . The scoring of a game goes up by 15, 30, 40, then game or if both players are tied at 40 that it goes to duce in wich a player must score two times in a row to win the game. Once you are at 40 though you still must get one more point to win. If the ball hits on the line, than it is counted in but if it hits out of the designated area than the ball is called out.