Jelena Jankovic wasn't the only top seeded woman to get a scare in the first round of the U.S. Open.

Maria Sharapova was pushed hard by Jarmila Groth of Australia in what looked like a possible first round upset.

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"I think she came out today and really swung and didn't give me much time to do anything out there. She served really well in the first set. I wasn't returning that well, giving her a lot of looks, you know, on second serves," Sharapova said.

Sharapova battled back after a tough first set 4-6, 6-3, 6-1. Sharapova won the U.S. Open in 2006 when she defeated Justine Henin. She will now face the Czech Republic's Iveta Benesova.