The emergence of Juan Martín del Potro as 2009 U.S. Open men's singles champ was an unexpected, though not unwelcome, development. Delpo played absolutely lights out ball in dispatching a less-than-100% Rafael Nadal yesterday in the semifinal. And just when you thought Roger Federer looked set to assert himself and nail down another major title, the Argentine dug deep and blasted winners from an amazing forehand to claim his first Slam crown. May not be his last big win, I suspect!
