...line judge which led to her disqualification during the Women's Singles Semifinal match against to Kim Clijsters of Belgium on day thirteen of the 2009 U.S. Open at the USTA Billie Jean...

...Williams (R) is disqualified for a foot fault during the Women's Singles Semifinal match against Kim Clijsters of Belgium on day thirteen of the 2009 U.S. Open at the USTA Billie Jean...

...12: Serena Williams argues with a line judge during her Women's Singles Semifinal match against Kim Clijsters of Belgium on day thirteen of the 2009 U.S. Open at the USTA Billie Jean...

Serena Williams of the US reacts to losing a point to Kim Clijsters of Belgium during their semifinal match of the 2009 US Open at the USTA Billie Jean...

Kim Clijsters from Belgium against Caroline Wozniacki from Denmark during the Women's Final US Open match at...

...line judge which led to her disqualification during the Women's Singles Semifinal match against to Kim Clijsters of Belgium on day thirteen of the 2009 U.S. Open at the USTA Billie Jean...

Kim Clijsters completes stunning US Open run

Serena's Outburst

...on match point and a loss for Williams in a women's singles semifinal match against Kim Clijsters of Belgium on Day 13 of the 2009 U.S. Open at the USTA Billie Jean...

NEW YORK - SEPTEMBER 13: Kim Clijsters of Belgium kisses the championship trophy after defeating Caroline Wozniacki of Denmark in the Women�...

NEW YORK - SEPTEMBER 13: Kim Clijsters of Belgium holds up the championship trophy after defeating Caroline Wozniacki of Denmark in the Women...

NEW YORK - SEPTEMBER 13: Kim Clijsters of Belgium celebrates after defeating Caroline Wozniacki of Denmark during the Women s Singles final on...

NEW YORK - SEPTEMBER 13: Kim Clijsters of Belgium returns a shot to Caroline Wozniacki of Denmark during the Women�s Singles...

Serena Williams, of the United States, at a press conference after her match against Kim Clijsters, of Belgium, at the U.S. Open tennis tournament in New York, Saturday, Sept. 12, 2009...

Caroline Wozniacki, of Denmark, reaches out to return a volley from Kim Clijsters, of Belgium, during the women's championship match at the U.S. Open tennis tournament in...

Kim Clijsters, of Belgium, returns a shot to Caroline Wozniacki, of Denmark, during the women's championship match...