CREATE TABLE table_69877 ("Tournament" CLOB, "1990" CLOB, "1991" CLOB, "1992" CLOB, "1993" CLOB, "1994" CLOB, "1995" CLOB, "1996" CLOB, "1997" CLOB, "1998" CLOB, "Career SR" CLOB)

In 1994 what tournament held a ATP masters series
SELECT "1994" FROM table_69877 WHERE "Tournament" = 'atp masters series'
SELECT "1994" FROM "table_69877" WHERE "Tournament" = 'atp masters series'