(CNN) -- Here's a look at the life of professional tennis player Serena Williams, currently ranked number one in the world.
Personal: Birth date: September 26, 1981
Birth place: Saginaw, Michigan
Birth name: Serena Jameka Williams
Father: Richard Williams, tennis coach
Mother: Oracene Price
Other Facts: Currently ranked the Women's Tennis Association's (WTA) number one in the world.
Has won 55 career singles titles, 22 doubles titles and two mixed doubles titles. This includes 32 Grand Slam titles - 17 singles titles, 13 doubles titles and two mixed doubles titles.
Four-time Olympic gold medalist.
Has won more than $50 million in career prize money, more than any other female athlete.
Is fifteen months younger than sister and tennis pro Venus Williams.
Is a Jehovah's Witness.
Timeline: September 1995 - Turns professional, losing her debut tennis match at the Bell Challenge in Quebec.
January 1998 - Enters the Australian Open, her first Grand Slam tournament. She loses to her sister, Venus, in the second round, 6-7, 1-6.
1999 - Enrolls at the Art Institute of Fort Lauderdale in Florida for fashion design.
September 12, 1999 - Wins the U.S. Open, becoming the first Williams sister to win a Grand Slam.
July 8, 2002 - Ranked Women's Tennis Association (WTA) world number 1 for the first time in her career, at age 20.
August 1, 2003 - Has surgery to repair a partially torn tendon in her left knee.
September 14, 2003 - Williams' older half-sister, Yetunde Price, is murdered in Compton, California.
2004 - Launches "Aneres" clothing line (Serena spelled backwards).
2008 - Establishes the Serena Williams Foundation, to assist American youth touched by violent crime and also underprivileged children around the world.
September 12, 2009 - Williams goes on a profanity-laced outburst against a line judge who calls her for a foot fault in the U.S. Open semifinals against Kim Clijsters. Clijsters is awarded a penalty point to win the match. The Grand Slam committee later fines Williams a record $82,500 and places her on probation for the next two years.
July 7, 2010 - Receives stitches in both her feet after stepping on broken glass while leaving a restaurant in Munich. Later, she has to have surgeries in July and October to repair a lacerated tendon on her right foot.
February 2011 - Undergoes emergency treatment for a hematoma related to a pulmonary embolism, a blood clot in her lungs.
September 2011 - Appointed a UNICEF international goodwill ambassador.
February 18, 2013 - At age 31, becomes the oldest female tennis player to be ranked number 1 since computer rankings began in 1975. This is the sixth time in her career to be ranked number one.