Rafael Nadal’s Australian Open loss isn’t Wednesday’s biggest tennis news: Justine Henin, the former women’s No. 1, announced her retirement from tennis on Wednesday on Facebook. She had previously retired in 2008, then returned in 2010 and reached the Australian Open final, where she lost to Serena Williams. She lost in the third round of this year’s Australian Open. "I spent the last days undergoing various medical tests and they have confirmed that my elbow has been damaged by my adventure in Australia,” she wrote. “My elbow is too fragile and hurt so that my passion and my profession at high level cannot continue to exist.” Henin won the French Open in 2005, 2006, 2007; the U.S. Open in 2003 and 2007; the Australian Open in 2004; and the Olympic gold medal in 2004.