Vondrousova had been seeded No. 17 in the women's draw at Flushing Meadows, where play begins Monday. The U.S. Tennis Association announced Vondrousova's withdrawal Friday and said Zhang Shuai — the next player eligible to be seeded — will move into her line in the tournament bracket. Zhang's line will be filled by a qualifier or lucky loser.
Vondrousova reached the U.S. Open's fourth round last year, her best showing at a Grand Slam tournament until her run to the final at Roland Garros in June.
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