Manchester United survived a huge FA Cup fright to win 4-2 at Newport after the Welsh minnows levelled having been two goals down.
Bruno Fernandes and Kobbie Mainoo - with his first United goal - struck inside the opening 13 minutes and safe passage into the fifth round seemed inevitable.
But Newport shook Rodney Parade to its rafters as Bryn Morris and Will Evans levelled and made light of the 76 rungs between the two clubs on the football ladder.
United's troubled season was in danger of sinking to a new low, but a last-16 date at Bristol City or Nottingham Forest was eventually secured as Antony scored for the first time since last April and Rasmus Hojlund sealed matters in stoppage time.