CREATE TABLE table_74452 ("Tournament" TEXT, "Player" TEXT, "Nationality" TEXT, "Team" TEXT, "Games played" FLOAT, "Goals conceded" FLOAT, "Coefficient" TEXT)

How many nationalities are there for the 2011 apertura?
SELECT COUNT("Nationality") FROM table_74452 WHERE "Tournament" = '2011 Apertura'
SELECT COUNT("Nationality") FROM "table_74452" WHERE "Tournament" = '2011 Apertura'