CREATE TABLE table_12285 ("Outcome" TEXT, "Date" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

Who was the opponent on 19 February 2011?
SELECT "Opponent" FROM table_12285 WHERE "Date" = '19 february 2011'
SELECT "Opponent" FROM "table_12285" WHERE "Date" = '19 february 2011'