US Open derailed!

A semifinal with an unexpected result in today's US Open...Juan Martin del Potro of Argentina dominated Rafael Nadal of Spain, 6-2, 6-2, 6-2.
The announcers had basically been looking past him to a Federer-Nadal final. Now it's possible that we may even have a Del Potro-Djokovic final.
How cute was little del Potro in his post-match interview?

About beating Rafa, he said, "I"m sorry."
And, not content to beat Rafa in tennis, he started a humility contest as well: "I'm not strong, but I do my best." Yeah. Yeah you do.