PICTURE OF THE DAY

SISTER ACT 4. Serena Williams of USA (R) and sister Venus Williams of USA talk tactics during the women's doubles semi final match against Cara Black of Zimbabwe and Liezel Huber of USA on Day Eleven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 3, 2009 in London, England.

The sisters will face-off for the fourth time for the Women’s Singles title this weekend.

(Photo by Paul Gilham/Getty Images)