The Sony Ericsson Championships, the season-ending event of the Women's Tennis Association, is being held in the Middle East for the first time this week. Billie Jean King, who helped found the WTA Tour, says that she believes by holding the event in Doha, Qatar, tennis can help bring change to a region where women's rights are often limited. Some changes have been made to accommodate local customs: advertising can only be done in silhouette when depicting women in tennis skirts outdoors, but uncovered legs and arms can be shown indoors. This is also the first year that the WTA is offering prize money equal to the men's year-end championship, $4.55 million. "Equal prize money is not principally about the money," said King. "It's about the message it gives." [Yahoo]