CREATE TABLE table_35324 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

Who was the Opponent on a Hard (i) Surface?
SELECT "Opponent" FROM table_35324 WHERE "Surface" = 'hard (i)'
SELECT "Opponent" FROM "table_35324" WHERE "Surface" = 'hard (i)'