The USTA and U.S. Fed Cup Captain Mary Joe Fernandez have announced that world number one-ranked and 13-time Grand Slam singles champion Serena Williams and world number four-ranked and five-time Wimbledon singles champion Venus Williams have committed to representing the U.S. in the 2010 Fed Cup by BNP Paribas World Group Final against Italy on an indoor hard court at the San Diego Sports Arena in San Diego, Nov. 6-7.