Answer: wta

AnswerCrossword Clue
WTAOrg. for Serena Williams
WTAOrg. for Sharapova and Kournikova
WTABillie Jean King Trophy org.
WTAOrg. for Venus and Serena Williams
WTAInternational racqueteer gp.?
WTASports grp. founded by Billie Jean King