Rafael Nadal brings winning streak into US Open

Associated Press
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Spain's Rafael Nadal practices a day before the US Open tennis tournament, Sunday, Aug. 25, 2013, in New York. (AP Photo/Charles Krupa)

NEW YORK (AP) — Ask Rafael Nadal how his famously troublesome left knee is feeling on the eve of the U.S. Open, and he balks a bit while formulating a response.

"I am ..." the 12-time major champion begins during an interview with The Associated Press.

"You know ..." he resumes, before smiling sheepishly and pausing again.

Eventually, Nadal offers something of a complicated answer, saying that he figures he needs to say he's doing well because of how well he's been playing. He takes a 10-match winning streak into Monday against American Ryan Harrison as the year's last Grand Slam tournament begins at Flushing Meadows.

The second-seeded Nadal says it "will sound strange" if he says he still has problems with his knee. But he adds he still has "pain some days."