BEIJING — With head coach Hugh McCutcheon on the sidelines for the first time at the Beijing Games, the United States men's volleyball team swept host China in the minimum three sets Saturday morning and solidified its spot in next week's medal-round quarterfinals.

The Americans avenged a loss to the Chinese the last time the two teams met with Saturday's 25-22, 25-12, 25-18 victory.

U.S. middle blocker Ryan Millar tallied seven kills and two blocks and libero Rich Lambourne contributed nine digs. Millar and Lambourne played at BYU in the late 1990s when McCutcheon was an assistant coach there.

McCutcheon had been absent since the Games' opening day, when his in-laws were stabbed by an assailant at a Beijing tourist site. Todd Bachman was killed in the Drum Tower attack, while Barbara Bachman sustained serious injuries that were initially labeled life-threatening.

McCutcheon and his wife, Elisabeth, a former U.S. women's volleyball team member and '04 Olympian, stayed with Barbara Bachman during her recovery. With her recovery progressing, she was transferred this weekend via air ambulance to a U.S. hospital.

With one slate left of preliminary pool matches, the U.S. improved to 4-0 in Group A. Since two teams were winless with 0-3 marks going into Saturday's matches, the Americans were guaranteed a spot in the quarterfinals, with seeding depending on final pool standings.

U.S. MEN THRU TO ROUND OF 8: Americans Phil Dalhausser and Todd Rogers have advanced to the quarterfinals of the Olympic beach volleyball tournament, squeaking by Switzerland in three sets 21-16, 21-23, 15-13.

Martin Laciga and Jan Schnider took a 6-0 lead in the final set Saturday, but the reigning world champions tied it 7-7 and then went ahead 13-10. After missing on their first match point, Rogers eased the ball into an open corner for the win.

Heavy favorites to win the gold medal in their Olympic debuts, Dalhausser and Rogers have won three straight since their Beijing opening upset by the No. 23 seed from Latvia.

The other U.S. men's team, Jake Gibb and Sean Rosenthal, played Spain later Friday night.

YORDANOVA OUT OF OLYMPICS FOR DOPING: Bulgarian middle-distance runner Daniela Yordanova has tested positive for testosterone and will not compete at the Beijing Olympics.

Team spokesman Todor Shabanski said the 1,500-meter runner was on the verge of flying to Beijing but stayed behind after the result became known.

"It was confirmed," Shabanski said. "She has withdrawn from the Olympics and will not be traveling to Beijing."

The 32-year-old Yordanova was fifth in the 1,500 at the 2004 Athens Games and was the bronze medalist at the 2006 European Championships.

Yordanova tested positive in a June 13 out-of-competition test in the Bulgarian capital of Sofia.

Associated Press contributed to this report.