Ayumi Morita, ranked 51st in the world, was slated to play Sara Errani in the first round.
Ayumi Morita, ranked 51st in the world, was slated to play Sara Errani in the first round.
Elsa/Getty Images

NEW YORK (AP) -- Ayumi Morita of Japan pulled out of the U.S. Open on Sunday because of a lower back injury.

The 51st-ranked Morita had been scheduled to play fourth-seeded Sara Errani of Italy, the runner-up at the 2012 French Open and a semifinalist at the 2012 U.S. Open.

Instead, Errani will play 152nd-ranked Olivia Rogowska of Australia in the first round at Flushing Meadows. Rogowska is a "lucky loser'' - a player who loses in qualifying rounds but gets into the main draw because someone withdrew. She is 0-2 in the U.S. Open, having lost in the first round in 2009 and last year.

The hard-court tournament begins Monday.

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