CREATE TABLE table_73147 ("Tournament" TEXT, "Also currently known as" TEXT, "City" TEXT, "Country" TEXT, "Court surface" TEXT, "Defending champion" TEXT)

How many defending champs from thailand?
SELECT COUNT("Defending champion") FROM table_73147 WHERE "Country" = 'Thailand'
SELECT COUNT("Defending champion") FROM "table_73147" WHERE "Country" = 'Thailand'