CREATE TABLE table_203_444 (id DECIMAL, "week" DECIMAL, "start date" TEXT, "type" TEXT, "tournament" TEXT, "surface" TEXT, "town" TEXT, "country" TEXT, "continent" TEXT, "prize money" TEXT)

what is the number of tournaments played on grass ?
SELECT COUNT("tournament") FROM table_203_444 WHERE "surface" = 'grass'
SELECT COUNT("tournament") FROM "table_203_444" WHERE "surface" = 'grass'