Bethanie Mattek-Sands, Mallory Cecil and Alison Riske have received wild cards into the main draw of the Family Circle Cup.
Mattek-Sands and Nadia Petrova won the 2010 doubles championship in Charleston.
Cecil received a wild card last year, and lost in the first round to Virginie Razzano. In 2008, she won the SMASH Junior Cup, which entitled her to a wild card into Charleston qualifying. Cecil won the NCAA singles championship while she was a freshman at Duke.
Riske won the SMASH Junior Cup title last year and received a wild card into Family Circle Cup qualifying.
Two more wild cards are to be awarded soon. The tournament begins on Monday, April 12, and qualifying takes place April 10 and 11.