Video: Rafael Nadal adds to U.S. Open highlight reel with forehand pass

Rafael Nadal unleashed this stunning forehand passing shot during his 6-7 (4), 6-4, 6-3, 6-1 victory over Philipp Kohlschreiber in the fourth round of the U.S. Open on Monday.
Nadal -- who hit this gem in the first round -- lost a set for the first time in four matches, but he's yet to be broken in 56 service games.
"Four matches without losing the serve is great," Nadal said. "I felt at the beginning [of Monday's match] I didn't serve my best. But then in the next sets, I am very happy the way that I served. I was able to win a lot of points and start a lot of points in a good position."

Contributor, SI.com Nguyen is a freelance writer for SI.com, providing full coverage of professional tennis both on and off the court. Her content has become a must-read for fans and insiders to stay up-to-date with a sport that rarely rests. She has appeared on radio and TV talk shows all over the world and is one of the co-hosts of No Challenges Remaining, a weekly podcast available on iTunes. Nguyen graduated from the University of California, Irvine in 1999 and received a law degree from the University of California, Davis in 2002. She lives in the Bay Area.