Croatia's Ivo Karlovic serves to Germany's Philipp Petzschner during their Davis Cup tennis match in Zagreb, Croatia, Sunday, March 6, 2011. The International Tennis Federation says Croatia's Ivo ... more 
Croatia's Ivo Karlovic serves to Germany's Philipp Petzschner during their Davis Cup tennis match in Zagreb, Croatia, Sunday, March 6, 2011. The International Tennis Federation says Croatia's Ivo Karlovic set a world record with a 156 mph serve Saturday during a Davis Cup doubles match against Germany on March 5, 2011. less 
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Associated Press | Photo By Darko Bandic
Sun, Mar 6, 2011 10:40 AM EST