John Isner of Tampa, Fla., and Nicolas Mahut of France are playing what already is the longest match on record in tennis history. Their first-round match at Wimbledon has lasted more than 7 1/2 hours -- breaking the record of 6 hours, 33 minutes set in a 2004 French Open match. Isner and Mahut have played more than 80 games in the fifth set alone. More...