Tennis-Factbox on Serena and Venus Williams

Sept 7 (Reuters) - Factbox on Americans Serena and Venus Williams, who will meet in a quarter-final at the U.S. Open on Tuesday. BORN: * Serena - In Michigan on September 26, 1981. (Age: 33) * Venus - In California on June 17, 1980 (Age: 35) GRAND SLAM CAREER: * Serena - 21 wins: Australian Open (2003, 2005, 2007, 2009, 2010, 2015); French Open (2002, 2013, 2015); Wimbledon (2002, 2003, 2009, 2010, 2012, 2015); U.S. Open (1999, 2002, 2008, 2012, 2013, 2014) * Venus - seven wins: Wimbledon (2000, 2001, 2005, 2007, 2008); U.S. Open (2000, 2001) HEAD-TO-HEAD: * Overall - Serena leads 15-11 * Quarter-finals or earlier - Venus leads 5-3 * In grand slams - Serena leads 8-5 * At U.S. Open - Tied 2-2 CAREER TITLES (INCLUDING GRAND SLAMS) * Serena 69 * Venus 46 WORLD RANKING: * Serena - 1 * Venus - 23 PERSONAL LIFE: * Born to Richard Williams and Oracene Price, the family moved to Florida when Venus was 10 so the sisters could attend a tennis academy * Serena turned professional in Sept. 1995 * Venus turned professional in Oct. 1994 * Serena won first WTA title in Paris in 1999 * Venus won first WTA title in 1997 * Serena is third on the list of female grand slam title winners * Venus is equal 12th on the list MORE ON SERENA * Serena Is one of only five women, after Maureen Connolly, Margaret Court, Martina Navratilova and Steffi Graf, to hold all four grand slam titles at same time. * She also owns 13 women's grand slam doubles titles with Venus and has won four Olympic gold medals: Singles (2012), doubles (2000, 2008, 2012). * Beat Martina Hingis in the U.S. Open final in 1999, becoming the first African American woman to win a grand slam singles title since Althea Gibson in 1958. * Failed to make another grand slam final until 2001 when she lost in the U.S. Open final to older sister Venus. * Missed the 2002 Australian Open with injury then embarked on an incredible run that included winning five of the next six grand slams and losing in the semi-finals of the 2003 French open. * Career affected by injury over the next four years, winning two Australian Open titles in 2005 and 2007 but failing to advance beyond the quarter-finals at the other three. * Won U.S. Open in 2008 to break the grand slam drought, having not won a major title since the 2007 Australian open. * At the 2009 U.S. Open, Williams was fined $175,000 and placed on a two-year probation for unsportsmanlike behaviour in her semi-final loss to Kim Clijsters. * Joined Billie-Jean King on all-time grand slam list in sixth with 12th grand slam title at 2010 Australian Open. * She missed the U.S. Open in 2010 because of medical complications after cutting her foot on glass while celebrating her win at Wimbledon. * In 2011, she underwent surgery after a life-threatening blood clot was detected on her lung. She made the U.S. Open final but lost to Australia's Sam Stosur. * Won Wimbledon title in 2012 and followed that up with Olympic gold medal on the same grass courts beating top seed Victoria Azarenka in semi-finals and third seed Maria Sharapova in final. * Won fourth U.S. Open title in 2012, beating Azarenka in the final. * Crashed out to teenage compatriot Sloane Stephens in Australian Open quarter-final in 2013 but rebounded to claim her second Roland Garros title, one of 10 titles she wins that year to reclaim world top ranking. * Knocked out early in 2014 Australian Open, but claims seven titles, including her sixth U.S. Open, which is her third in succession, to join compatriots Chris Evert and Martina Navratilova on 18 grand slam wins. * Defeats Maria Sharapova in the 2015 Australian Open final to claim her 19th grand slam title. * Despite battling a bout of flu, she wins a third successive major title and 20th overall by overcoming Czech left-hander Lucie Safarova in the French Open final. * Claims so-called 'Serena Slam' by winning sixth Wimbledon crown to hold all four majors for the second time in her career. (Compiled by Toby Davis/Andrew Both. Editing by Steve Keating.)