Serena Williams

Serena Williams is pulling out of the United States Fed Cup semifinal against Russia at Stowe, Vt., this weekend because she injured herself during Wimbledon. The eight times Grand Slam singles champion will be replaced on the U.S. roster by Meilen Tu, who flew to Vermont to join the rest of the squad, a person at the U.S. Tennis Association told the Associated Press. The draw for the best-of-five semifinals is Friday, with matches Saturday and Sunday.