John Robert Isner is an American professional tennis player who is currently the highest-ranked male American tennis player. His legendary victory aginst one of Tennis's icon- Roger Federer in the Davis Cup encounter in February 2012 and the top seed Novak Djokovic at the 2012 Masters 1000 tournament in Indian Wells are some of the highlights in his illustrious career. He has also beaten Andy Roddick in the 2009 US Open and Nicolas Mahut at the 2010 Wimbledon Championships where he played the longest ever professional tennis match that lasted 11 hours and 5 minutes over the course of three days. Isner embarked on his professional career in 2007 and competed at the main draws of every tournament, even at the Futures level as a wild card entry. He won his first tournament of the year-the USA F14 Futures, beating the top three seeds along the way. The following week he reached the finals of Legg Mason Tennis Classic in Washington, D.C.. H e was adjudged the ATP Most Improved Player for 2009 becoming the tenth American to win the award. Th following year started off with a bang for Isner as he won his first even ATP title at the Heineken Open in Auckland. The victory catapulted Isner into the top 30 for the first time. Isner team up with fellow American Sam Querrey to win the Regions Morgan Keegan Championships in Memphis. Isner participated with Mardy Fish and Sam Querrey in the Davis Cup tie against Colombia, winning the doubles match with Fish as his partner. In 2011, Isner won the Winston-Salem Open after defeating Julien Benneteau in the final. Isner won another title at the 2012 Winston-Salem Open, defeating Tomas Berdych in the final.