CREATE TABLE table_73939 ("Year" FLOAT, "Championship" CLOB, "Surface" CLOB, "Partner" CLOB, "Opponents in final" CLOB, "Score in final" CLOB)

Who was his partner in 1989?
SELECT "Partner" FROM table_73939 WHERE "Year" = '1989'
SELECT "Partner" FROM "table_73939" WHERE "Year" = '1989'