CREATE TABLE table_35986 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

What is the opponent for the tournament of rio de janeiro?
SELECT "Opponent" FROM table_35986 WHERE "Tournament" = 'rio de janeiro'
SELECT "Opponent" FROM "table_35986" WHERE "Tournament" = 'rio de janeiro'