At 6ft 9ins, John Isner is being hailed as America's new tennis idol.

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Isner is a product of the American college system and has already proved that he has the potential to make it big.

He had great success at the University of Georgia, where he won the NCAA doubles title as a sophomore, led his team to the National Championship, and was selected to the All-American team for four  successive years.

Isner started his ATP career with a ranking of 839 but shot up to 416 after winning his first USA F14 tournament. That entitled him to a place in the 2007 US Open and he reached the third round in his first ever Grand Slam.

But he had already made a big impression before falling to eventual champion Roger Federer 6–7(4) 6–2 6–4 6–2. Isner aced Federer 18 times, and finished with 66 aces for the tournament and was one of only two players to take a set off of Federer in the championship. His ranking rocketed to 144.

Isner had a quiet 2008, but he had the crowd in shock during the US Open last year. Ranked 55th, he knocked out fellow countryman Andy Roddick in the third round, firing 38 aces in a  great five-setter.

Isner started the 2010 season by winning the Heineken Open then eased through two rounds in the Australian Open before going out to Andy Murray, but not before he had gate-crashed the top 30 rankings, not far behind his American pal Roddick.

The future of American tennis is in good hands and we should see the big guy break into the world's top ten this year. And a Grand Slam title is not out of the question for the 24-year-old  over the next two or three years.

John Isner is like Juan Martin Del Potro and Ivo Karlovic rolled into one. Remember the name . . .