This was the fourth FA Cup tie between Fulham and Southampton, with the Cottagers progressing in the third round in 1998/99 after a replay and the Saints winning in the second round in 1914/15 and third round in 2017/18.
If they can overcome quite literally by far the greatest team the world has ever seen, surviving a magic-adjacent wobble in the process, it is difficult to fathom what might possibly stop the Gunners now. The answer is probably the same as it has been for months: themselves.