In 1999, Williams, the former number one player in the world, won her first Grand Slam tournament when she won US Open and also became the very first African American woman to win a Grand Slam tournament since Althea Gibson in 1958.

In 2000, Williams won the doubles gold medal at the Olympics with sister Venus. In 2002, she won the French Open, Wimbledon, and the US Open. She finished the year with a 56-5 record and 8 titles, arguably becoming the most dominant female in tennis at that time.

She also stayed number one for a year and during that year won 5 of her 7 Slam Titles. She also reached one more of the WTA tour championships for a second time before losing to Kim Clijsters. She also won the Wimbledon doubles title with her sister Venus for a second time.

In 03, Serena won the Australian Open, her fourth straight Grand Slam singles title, becoming only the ninth woman ever to win all four Grand Slam events. Her accomplishment was dubbed the Serena Slam.

Williams withdrew from the Australian Open in 2004 to continue rehabilitating her left knee but reached the final of Wimbledon once again. However, she lost to 17-year-old Russian, Maria Sharapova.

In 2005, she won her seventh Grand Slam, winning the Australian Open. Williams may be at the end of her tennis legacy, but even if she never wins another match, Serena has proven herself to be a champion through and through.