Russia's Maria Sharapova returns the ball to China's Na Li at the Italian Open tennis finals, in Rome, May 20, 2012. Andrew Medichini/AP
Maria Sharapova of Russia serves to Alexandra Cadantu of Romania during the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2012. Regis Duvignau/Reuters
Maria Sharapova holds the trophy after defeating Li Na of China at the Rome Masters tennis tournament May 20, 2012. Alessandro Bianchi/Reuters
Maria Sharapova serves to Li Na of China during their final match at the Rome Masters tennis tournament May 20, 2012. Giampiero Sposito/Reuters
Maria Sharapova of Russia eyes the ball as she hits a return to Angelique Kerber of Germany during their match at the Rome Masters tennis tournament May 19, 2012. Alessandro Bianchi/Reuters
Russia's Maria Sharapova hits a return to Belarus' Victoria Azarenke during their women's singles final match at the WTA tennis tournament in Stuttgart April 29, 2012. Michaela Rehle/Reuters
Russian tennis star Maria Sharapova and her fiancé, Sasha Vujacic, a Slovenian shooting guard for the Los Angeles Lakers, attend the launch of Ms. Sharapova's fall 2010 clothing line in August. Mr. Vujacic announced the couple's engagement on Oct. 2011. Chance Yeh/PatrickMcMullan.com/Sipa Press/Newscom
Maria Sharapova holds the winner's trophy after defeating Serena Williams in the women's singles final match at Wimbledon in 2004. Sharapova won 6-1, 6-4. Anja Niedringhaus/AP
Maria Sharapova holds the women's US Open trophy at the tennis tournament in New York in 2006. Sharapova defeated Belgium's Justine Henin-Hardenne in the final. Mike Segar/Reuters
Maria Sharapova enjoys a career as a model, with endorsements ranging from Range Rover to Nike. In 2007, Forbes magazine listed her as the highest-paid female athlete in the world, with annual earnings of more than $26 million. (c) Nike
Maria Sharapova makes a backhand return to Ioana Raluca Olaru of Romania at the All England Lawn Tennis Championships at Wimbledon, June 2010. Jon Super/AP
Maria Sharapova cheers after winning her match against Jarmila Groth of Australia during the first round of the US Open tennis tournament in New York in August, 2010. Paul J. Bereswill/AP
Tennis grunting ban: Maria Sharapova's screams have been measured at more than 101 decibels. Martina Navratilova calls grunting "cheating, pure and simple" and wants tennis to ban it sooner rather than later.
Plans to muzzle the ear-bashing grunters of women's tennis have found an unlikely ally in Maria Sharapova.
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