Ana Ivanovic of Serbia eyes the ball during her match against Lindsay Davenport of U.S. Ana Ivanovic of Serbia at the Sony Ericsson Open tennis tournament in Key Biscayne, Florida March 30, 2008. [Agencies]

Davenport, who has been struggling with a right knee injury, is still hoping to play doubles with Liezel Huber.

The 32-year-old American has not played a match since Wimbledon in June where she was forced to withdraw in the second round.

Three-times grand slam champion Davenport, who came out of retirement last year after giving birth to her son with the specific intention of competing in Beijing, still hopes to win another medal to go with her gold from Atlanta in 1996.

"I'm fortunate to have the number one (doubles) player in the world as a doubles partner," Davenport told reporters.