World number one women's tennis player Lindsay Davenport of the United States had to withdraw from the quarterfinals of the Family Circle Cup tennis tournament in Charleston, South Carolina.
Davenport was trailing Justine Henin-Hardenne of Belgium (6-3, 3-6, 1-0) when the American retired with a hip injury.
Henin-Hardenne next takes on 17-year-old French player Tatiana Golovin, who scored a straight-set win over seventh-seed Nadia Petrova of Russia (7-5, 6-3).
The Belgian player is taking part in only her second tournament after spending much of last year on the sidelines because of a viral infection and a knee injury.
The clay-court tournament is one of several events players are using to prepare for the second major tournament of the year, the French Open, which starts May 23 in Paris.
Some information for this report provided by AP.