CREATE TABLE table_33121 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

Which week with Green Bay Packers as an opponent is the highest?
SELECT MAX("Week") FROM table_33121 WHERE "Opponent" = 'green bay packers'
SELECT MAX("Week") FROM "table_33121" WHERE "Opponent" = 'green bay packers'