O.N.A.N.T.A.

The Organization of North American Nations Tennis Association: the continental governing and ranking body of O.N.A.N.-era tennis. John Wayne was "the top-ranked junior male in Canada at sixteen as well as #5 overall in the Organization of North American Nations Tennis Association computerized rankings" and is now "currently ranked #3 in the O.N.A.N.T.A.’s Boys’ 18’s and #2 in the U.S.T.A." (p. 259) — the continental ladder ("O.N.A.N.T.A.-wise," p. 259) runs alongside the older national U.S.T.A. numbers, and every E.T.A. player is measured on both.