CREATE TABLE table_5775 ("Outcome" TEXT, "Date" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent in the final" TEXT, "Score in the final" TEXT)

Which Partner has a Date of 8 february 2009?
SELECT "Partner" FROM table_5775 WHERE "Date" = '8 february 2009'
SELECT "Partner" FROM "table_5775" WHERE "Date" = '8 february 2009'