Answer:

USLTA

AnswerCrossword Clue
USLTAAlthea Gibson's org.
USLTACourt org. renamed in 1975
USLTATennis org.
USLTAFormer Forest Hills org.
USLTAOrg. for Tilden or Budge
USLTAOrg. for Budge and Tilden
USLTACourt org.
USLTAOrg. that raises a racket?
USLTAOrg. that used to bring people to court?
USLTAOld court org.