CREATE TABLE table_9220 ("Tournament" TEXT, "Surface" TEXT, "Week" TEXT, "Winner and score" TEXT, "Finalist" TEXT, "Semifinalists" TEXT)

what is the week when the finalist is marcelo r os?
SELECT "Week" FROM table_9220 WHERE "Finalist" = 'marcelo ríos'
SELECT "Week" FROM "table_9220" WHERE "Finalist" = 'marcelo ríos'