Answer: frenchopen

AnswerCrossword Clue
FRENCHOPENGrand Slam event
FRENCHOPENBillie Jean King won it in 1972
FRENCHOPENAnnual tennis tournament played on clay
FRENCHOPENTennis tournament played on red clay
FRENCHOPENCompetition won 12 times by Rafael Nadal