In 1930 the "Association Française des Professeurs de Tennis (AFPT)" held its first pro tournament, entitled "Championnat International de France Professionnel" (French Pro Championships) in June, 18-22, 1930.
From 1930 the French Pro Championship were always played at Paris, on outdoor clay at Roland Garros except from 1963 to 1967 where it was held at Stade Pierre de Coubertin on indoor wood.
References
French Pro Championship draws Wikipedia(Text) CC BY-SA