BEIJING -- Lindsay Davenport withdrew from singles at the Olympics on Friday because of a lingering knee injury that has sidelined her since late June.
Davenport still hopes to play doubles with US teammate Liezel Huber. The tournament begins Sunday.
The 32-year-old Davenport returned to the women's tour last year after becoming a mother, and her comeback was motivated in large part by a desire to play at Beijing. She won the gold medal in singles at Atlanta in 1996, and her father played volleyball at the 1968 Olympics.
Hours before withdrawing, Davenport attended a news conference for the US tennis team and said her right knee was still a concern.
"I've been resting it since hurting it at Wimbledon for the purpose of being here and being able to do my best," she said. "For me it's a thrill to be back no matter what happens. It's the Olympics."
Davenport hasn't played since winning her opening match at Wimbledon, where she withdrew before the second round.