Serena Williams upset by Samantha Stosur in French Open quarterfinals

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Top-ranked Serena Williams failed to convert a match point in the quarterfinals of the French Open and lost, 6-2, 6-7 (2), 8-6, to Australian Samantha Stosur on Wednesday.

Seventh-seeded Stosur used a forceful forehand to build a lead and won 17 consecutive points during one stretch. Williams was able to mount a comeback and was a point away from winning the 10th game of the final set, but her forehand sailed an inch long.

After hitting consecutive cross-court winners to break for a 7-6 lead, Stosur then served out the victory, with service winners on the final three points.

Stosur was coming off a fourth-round upset victory over four-time champion Justine Henin, who had won 24 straight matches at Roland Garros.

[Updated at 12:40 p.m.: Williams and her sister, Venus, advanced to the doubles final with a 2-6, 6-2, 6-4 victory over Liezel Huber of the United States and Anabel Medina Garrigues of Spain.]

-- Chuck Schilken

The Associated Press contributed to this story.