LONDON (AP) - Destinee Hooker threw her arms around teammate Courtney Thompson in celebration.

"Courtney's a quarterback," Hooker said. "She went out there and took control of the game. She knows our rhythm, and it was great to have her on the court."

The 27-year-old setter replaced injured U.S. team captain Lindsey Berg in the straight-set victory over the Dominican Republic to advance the Americans to the women's volleyball semifinals.

The U.S. women remained undefeated in six matches at the London Olympics with the 25-14, 25-21, 25-22 sweep of the Dominicans.

Former Husker All-American and Hooper, Neb., native Jordan Larson had nine kills and two blocks for the U.S.

The top-ranked Americans on Thursday will play South Korea, whom the U.S. beat 3-1 in its first Olympic match. The other semifinal Thursday will feature Japan and Brazil.

Berg's status for the semifinals is uncertain. She injured her left ankle Sunday in a win over Turkey.

"It's day-to-day," U.