CREATE TABLE table_50561 ("Tournament" CLOB, "Surface" CLOB, "Week" CLOB, "Winner and score" CLOB, "Finalist" CLOB, "Semifinalists" CLOB)

Which Week has a Tournament of monte carlo?
SELECT "Week" FROM table_50561 WHERE "Tournament" = 'monte carlo'
SELECT "Week" FROM "table_50561" WHERE "Tournament" = 'monte carlo'