Serena Williams

Age: 28
Occupation: Professional Tennis Player
Previous TIME 100 Appearances: 0

Her ugly U.S. Open outburst against a line judge, who called a foot fault that helped her lose a semifinal match to Kim Clijsters, will forever stain her career. But some fans tend to forget about her tremendous accomplishments. Cynics have always questioned her dedication, yet she's won 12 Grand Slam Titles over an eleven-year span. And her Serena Williams Foundation has raised money for Haiti relief and helped build a secondary school in Kenya.

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