Rafael Nadal isn't the only person worried about his knee

Rafael Nadal said today that he's not arriving in New York City in the best condition. Oddsmakers agree.

The six-time Grand Slam champion is going off as just a 7-1 favorite to win the U.S. Open. Those certainly aren't long odds, but they're steep enough to suggest that Vegas is just as worried about Nadal's knee as he is.

Nadal told the Associated Press:

"Well, I am No. 3 in the world. And the No. 3 in the world should have a chance to win, no? But I don't know if I arrive in best condition."

Even while healthy, Nadal has never fared too well at Flushing Meadow. Not only has the Spaniard never won the U.S. Open (the only Grand Slam title not on his resumé), but he's yet to even advance to a final. Nadal made it to the semifinals last year before losing to Andy Murray. And only once before that had he made it past the fourth round.

Roger Federer, the five-time defending Open champion, is unsurprisingly the favorite to win at 6-4, with No. 2 seed Andy Murray next at 7-2.

Nadal joined Serena Williams and John McEnroe in midtown Manhattan today for a Nike promotional event in which the stars unveiled their opening round wardrobe for next week's tournament. Serena was pretty in pink, while Nadal donned a yellow shirt with black polka dots across the chest (it's the same design as the shirt above).

(Serena, by the way, is the overwhelming favorite to win the women's draw. Despite (absurdly) being the No. 1 seed, Dinara Safina goes off at 14-1, behind both Williams sisters and Elena Dementieva.)

The fashion winner of the day was McEnroe, who was unironically wearing a t-shirt that bore his cartoon likeness. Luckily, the irony scale was balanced when Johnny Mac climbed into the umpire's chair while Nadal and Serena played an exhibition.

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