Liezel Huber (née Horn; born 21 August 1976) is a South African-American retired tennis player who represented the United States internationally since August 2007. Huber has won four Grand Slam titles in women's doubles with partner Cara Black, one with Lisa Raymond, and two mixed doubles titles with Bob Bryan. On 12 November 2007, she became the co-world No. 1 in doubles with Cara Black. On 19 April 2010, Huber became the sole No. 1 for the first time in her career. Personal life At age 15, she moved from South Africa to the United States to attend the Van Der Meer Tennis Academy in Hilton Head, South Carolina in 1992. Huber has since resided in the U.S. and became a naturalized American citizen in July 2007. She married Tony Huber, an American, in February 2000. In 2005, she started a foundation, 'Liezel's Cause', to raise money and gather basic supplies to assist the victims of Hurricane Katrina. She competed for the United States in the 2008 Beijing Olympics in doubles, partnering with former World No. 1 (in both singles and doubles) Lindsay Davenport; the pair lost in the quarterfinals. At the 2012 London Olympics, she teamed with Lisa Raymond. Together they reached the semi-finals, losing to Hlaváčková and Hradecká of the Czech Republic. They then lost the bronze medal match to Kirilenko and Petrova of Russia. In the mixed doubles she teamed with Bob Bryan but lost in the first round. Professional career Liezel Huber is primarily a doubles specialist, having achieved one of the best careers in this discipline. She has won 64 women's doubles titles in her career; of which 53 are on the WTA Tour and 11 on the ITF Women's Circuit. In singles, her greatest result in her career was reaching to the quarterfinals at the tournament in Pattaya City in 2001, where she lost to Henrieta Nagyová. She participated in two Grand Slam singles main draws, losing to Lindsay Davenport in the second round of the 1998 French Open. She lost in the 1999 US Open first round to Raluca Sandu. Her highest singles ranking was world no. 131, which she achieved on 29 March 1999. She enjoyed the majority of her first eight years on tour on the ITF Circuit. Huber has enjoyed successful women's partnerships with Magdalena Maleeva, Ai Sugiyama, Martina Navratilova, Lindsay Davenport, Cara Black, Sania Mirza, Nadia Petrova, Bethanie Mattek-Sands,