CREATE TABLE table_66780 ("Outcome" CLOB, "Date" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

Who is the opponent for the winner outcome on a hard surface on August 27, 2011?
SELECT "Opponent" FROM table_66780 WHERE "Outcome" = 'winner' AND "Surface" = 'hard' AND "Date" = 'august 27, 2011'
SELECT "Opponent" FROM "table_66780" WHERE "Date" = 'august 27, 2011' AND "Outcome" = 'winner' AND "Surface" = 'hard'