CREATE TABLE table_name_88 (tournament VARCHAR)

With a 1992 result of A, and at the U.S. Open Tournament, what is the 1989 result?
SELECT 1989 FROM table_name_88 WHERE 1992 = "a" AND tournament = "u.s. open"
SELECT 1989 FROM "table_name_88" WHERE "a" = 1992 AND "tournament" = "u.s. open"