NEW YORK --Mardy Fish, the 23rd-seeded American who was scheduled to play top-seeded Roger Federer on Monday afternoon in a fourth-round singles match at the U.S. Open, abruptly withdrew from the tournament.
Fish, a 30-year-old who had missed part of this season after having treatment for an irregular heart beat, has a 1-8 career record against the 31-year-old Federer. Fish had played listless, error-filled tennis in his third-round match, a 6-1, 5-7, 7-6 (5), 6-3 win over 16th-seeded Gilles Simon, who had been hampered by a shoulder injury that kept many of his first serves less than 100 mph.
