Sisters Serena, left, and Venus Williams shake hands after a match in 1991 in Compton, Calif. Paul Harris/Getty Images hide caption

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Before Superstardom, Williams Sisters Stunned On Compton's Courts
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World No. 1 Serena Williams acknowledges the crowd after winning her match against Monica Niculescu of Romania during the BNP Paribas Open at Indian Wells Tennis Garden in Indian Wells, Calif. Charls Baus/CSM /LANDOV hide caption

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Rafael Nadal (right) shakes hands with Tim Smyczek after winning a match at the Australian Open on Jan. 21. Rob Griffith/AP hide caption

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The Tennis Court Offers A Good Lesson For The NFL
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Britain's Andy Murray plays a return to Canada's Milos Raonic during their singles ATP World Tour tennis finals match Tuesday at the O2 arena in London. Tim Ireland/AP hide caption

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Imogen Davis catches Rufus, a Harris hawk, in the stands above Centre Court at Wimbledon. Rufus scares off pigeons who try to eat the ryegrass on the tennis courts. Peter Macdiarmid/Getty Images hide caption

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Pigeons Fly In Fear As Rufus The Hawk Guards Wimbledon's Grass
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Stanislas Wawrinka of Switzerland kisses the Australian Open trophy during the awarding ceremony after winning the men's singles final against Spain's Rafael Nadal on Sunday in Melbourne, Australia. Xu Yanyan/Xinhua/Landov hide caption

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Rafael Nadal of Spain celebrates after defeating Roger Federer of Switzerland during their semifinal Friday at the Australian Open tennis championship in Melbourne. Aaron Favila/AP hide caption

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Novak Djokovic of Serbia wipes the sweat from his face during his quarterfinal loss to Stanislas Wawrinka of Switzerland at the Australian Open tennis championship in Melbourne. Aaron Favila/AP hide caption

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Serena Williams holds up the championship trophy after defeating Victoria Azarenka, of Belarus, during the women's singles final of the 2013 U.S. Open tennis tournament on Sunday in New York. David Goldman /AP hide caption

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Venus Williams waves to tennis fans as she leaves the court after a three-hour loss to Zheng Jie of China in the U.S. Open's second round. Don Emmert/AFP/Getty Images hide caption

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Venus Williams hits a forehand during her first-round win over Kirsten Flipkens of Belgium Monday. Matthew Stockman/Getty Images hide caption

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France's Marion Bartoli celebrates her women's singles championship at The All England Lawn Tennis and Croquet Club in Wimbledon. Dominic Lipinski /PA Photos/Landov hide caption

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Serbia's Novak Djokovic (left) embraces Argentina's Juan Martin Del Potro after their match on day 11 of the 2013 Championships at Wimbledon. Carl Court/AFP/Getty Images hide caption

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Steve Darcis of Belgium, left, shakes hands with Rafael Nadal of Spain Monday, after winning their first-round match at the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club. Mike Hewitt/Getty Images hide caption

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