Isner beats Muller to reach Atlanta finals–awaits winner of Fish-Harrison semi
Muller's one of those players that had potential when he was a junior. One of the rare players from Luxembourg, Muller has had random success. He was the last player, other than Federer, to beat Nadal at Wimbledon (well, prior to this year). He beat Andy Roddick during the "mojo" year at the US Open