MELBOURNE - Former No. 1 Justine Henin has retired from tennis for a second time, citing a lingering elbow injury. The 28-year-old Belgian says on her website that 'my elbow is too fragile and hurt so that my passion and my profession at high level cannot continue to exist. Henin made the announcement five days after losing to Svetlana Kuznetsova 6-4, 7-6 (8) in the third round of the Australian Open. Henin has seven Grand Slams singles titles.