CREATE TABLE table_203_138 (id DECIMAL, "#" DECIMAL, "date" TEXT, "venue" TEXT, "opponent" TEXT, "score" TEXT, "result" TEXT, "competition" TEXT)

where was the first friendly competition held ?
SELECT "venue" FROM table_203_138 WHERE "competition" = 'friendly' ORDER BY "#" LIMIT 1
SELECT "venue" FROM "table_203_138" WHERE "competition" = 'friendly' ORDER BY "#" NULLS FIRST LIMIT 1