(AP Photo/Mike Groll)

NEW YORK (AP) Mark 2010 down as a low point for U.S. men's tennis.

The last of 15 American men left in the U.S. Open, 20th-seeded Sam Querrey, lost in the fourth round Tuesday, edged by No. 25 Stanislas Wawrinka of Switzerland 7-6 (9), 6-7 (5), 7-5, 4-6, 6-4 after nearly 4 1/2 hours of quite even, wind-affected play.

Querrey's exit means zero U.S. men reached the quarterfinals at Flushing Meadows for the second consecutive year - something that never had happened before 2009 in the history of a tournament that began in 1881.

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