Whoever wins the replay between those sides will face the Reds for the first time in our history.
Erik ten Hag's men won 2-0 away at Wigan Athletic in the last of the 32 third-round matches this evening, thanks to goals from Portuguese pair Diogo Dalot and Bruno Fernandes.
The draw, which was made 25 minutes before kick-off by former Tottenham Hotspur captain Gary Mabbutt and ex-Arsenal goalkeeper Emma Byrne, threw up several all-Premier League ties including Chelsea v Aston Villa, Fulham v Newcastle United and Spurs v Manchester City.
United's two prospective opponents drew 1-1 in their initial third-round match at Newport's famous Rodney Parade Ground on Saturday.