CREATE TABLE table_6499 ("Outcome" TEXT, "Date" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent" TEXT, "Score" TEXT)

Name the score for 21 may 2011
SELECT "Score" FROM table_6499 WHERE "Date" = '21 may 2011'
SELECT "Score" FROM "table_6499" WHERE "Date" = '21 may 2011'