Lindsay Davenport has pulled out of Wimbledon this year due to the back injury which has troubled her since last year's final at the All England Club.
The 30-year-old, who won Wimbledon in 1999 and was also a finalist in 2000, pulled out of the French Open last month with the back complaint.
She has been suffering with a lower back strain ever since losing in the Wimbledon final to Venus Williams last year in a memorable clash.
It was the longest-ever women's final, with Williams triumphing 4-6 7-6 (7-4) 9-7 after Davenport had served for the match at 6-5 in the second set and had a match point in the decider.
Williams' sister, Serena, withdrew from Wimbledon last month because of an on-going knee problem. She won the tournament in 2002 and 2003 but has suffered fitness problems over the last year.
Meanwhile, former world number one Carlos Moya has pulled out of the tournament following a shoulder injury.
The 29-year-old, who is currently ranked 39th in the world, was beaten in the third round of the French Open by Nikolay Davydenko of Russia and has enjoyed most of his success away from grass courts.
