where american reese hoffa claimed bronze.n the track, the battle to become the world's fastest woman began as american sprinter carmelita jenner posted the evening's best team in the 100-meter heats. >> this looked like someone who is ready to claim her first olympic medal. >> in tennis, the gold medal matches are set. >> serena williams will play for gold. >> it will be serena williams going for her first olympic singles medal against maria sharapova. while on the men's side, a wimbledon final rematch, roger federer came back to win in a match that lasted 4 1/2 hours. tomorrow, he'll face andy murray and all his british fans. >> looks like to the back post. is it the opening goal? the flag stays down. abby wambach scores again. >> and on the soccer pitch, abby wambach's fourth goal of these olympics sent the american women cartwheeling into next week's semifinals. there was also a big upset in men's beach volleyball. americans tom rogers and phil dalhausser, the defending gold medalists knocked out by an italian team. now ch