Sony Ericsson WTA Championships DOHA, QATAR - NOVEMBER 04: Venus Williams of United States plays a backhand in her match against...

...player Serena Williams reacts after loosing a point to her sister Venus Williams during their season-ending WTA Championships tennis match in Doha on November 6, 2008. Venus lost the first set 5-7, but...

Fed Cup: USA v Belgium DELRAY BEACH, FL - APRIL 24: WTA CEO Larry Scott and USTA CEO Arlen Kantarian during the quarterfinals of the Fed Cup between the...

...Safina of Russia returns the ball to compatriot Vera Zvonareva during their semi-final match at the WTA Kremlin Cup women's tennis tournament in Moscow on October 11, 2008

...of Serbia returns a service to Dominika Cibulkova (not pictured) of Slovakia during their match at the WTA Kremlin Cup women's tennis tournament in Moscow, on October 8, 2008. AFP PHOTO / YURI KADOBNOV (Photo...

...Jelena Jankovic returns a shot to Russian Nadia Petrowa in their final match of the women's WTA tennis tournament in Stuttgart on October 5, 2008. Jankovic will regain her world number one ranking after...

...No. 1 spot when the new rankings come out Monday and will be overtaken by Jelena Jankovic, WTA officials said. The American gained the top spot when she beat Jankovic in the final of the...

NEW YORK - SEPTEMBER 03: Chairman and CEO of Sony Ericsson WTA Tour Larry Scott speaks to the media during Day 10 of the 2008 U.S. Open at...

...retirement from competitive tennis. Henin, who will celebrate her 26th birthday on June 1, headed the official WTA rankings released Monday for the 117th consecutive week, but pulled out of the Rome Masters this week...

...tennis player Venus Williams waves to the crowd after victory against Austria's Samantha Stosur at the WTA Tennis Open in Rome on May 14, 2008. Venus Williams won 6-,6-1. AFP PHOTO / Andreas...

...S IDENTITY --- Serbia's Ana Ivanovic returns the ball to Bulgarian Tsvetana Pironkova (not pictured) during their WTA Tennis Open match in Rome on May 14, 2008. Pironkova won 6-4, 5-7, 6-2...

Flavia Pennetta of Italy in action in her match against Jelena Jankovic of Serbia during the WTA Sony Ericsson Tennis at the Foro Italico on May 14, 2008 in Rome, Italy. (Photo by Michael...

Sony Ericsson WTA Tour - Rome ROME - MAY 15: Serena Williams of USA in action during her match against Sara Errani...

...servs to Italian Sara US Serena Williams servs to Italian Sara Errani during their game at the WTA Tennis Open in Rome on May 14, 2008. Williams won 6-4, 6-3. AFP PHOTO / Christophe...

...tennis player Serena Williams reacts during the match against Russia's Dinara Safina at the German Open WTA tennis tournament in Berlin,Friday, May 9, 2008. Safina won the match in 2-6, 6-1...