Nalbandian, Ancic pull out of U.S. Open

NEW YORK -- David Nalbandian of Argentina and Mario Ancic of Croatia have withdrawn from the U.S. Open.

The United States Tennis Association said Friday that the 15th-ranked Nalbandian is recovering from hip surgery and the 90th-ranked Ancic is battling mononucleosis.

Ivan Navarro of Spain and Karol Beck of Slovakia will replace Nalbandian and Ancic in the main draw of the Grand Slam tournament that runs from Aug. 31 to Sept. 13.