CREATE TABLE table_12426 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Score" TEXT)

What Score has a Date of 11 september 2010?
SELECT "Score" FROM table_12426 WHERE "Date" = '11 september 2010'
SELECT "Score" FROM "table_12426" WHERE "Date" = '11 september 2010'