Justine Henin-Hardenne of Belgium eyes the ball before hitting against Meghann Shaughnessy of the U.S. during their tennis match at the NASDAQ-100 Open in Key Biscayne, Florida March 24, 2006. Shaughnessy defeated Henin-Hardenne 7-5 6-4. (Xinhua/Reuters)

WASHINGTON, March 24 (Xinhua) -- Third-seeded Justine Henin-Hardenne was defeated 5-7, 4-6 by American Meghann Shaughnessy in the second round, becoming the highest-seeded casualty at the Nasdaq-100 Open on Friday in Miami.

    The Belgian had won all three of her previous meetings against Shaughnessy but she suffered only her third defeat of the season after 18 victories including titles in Sydney and Dubai.

    The 2006 Australian Open runner-up was broken seven times and committed 27 unforced errors in a match lasting just over two hours.

    "She played really well and I wasn't at my best,"Henin-Hardenne said. "I missed a little bit of confidence, I played more neutral rather than going for the winners."

    Shaughnessy next plays Sofia Arvidsson after the Swede defeated Stephanie Foretz of France 6-4, 7-5.

    Top-seeded Amelie Mauresmo from France, however, took 44 minutes to beat Australian Samantha Stosur 6-0, 6-0.

    Six-times champion Andre Agassi withdrew with a chronic back injury before his opening match against Belgium's Christophe Rochus. He vowed to return once he is fit. Enditem