Manchester United will face Tranmere Rovers in the FA Cup fourth round on Sunday after the League One side defeated Watford 2-1.
With their initial replay called off due to a waterlogged pitch, Tranmere - who came back from 3-0 down to draw 3-3 at Vicarage Road - and Watford met at Prenton Park on Thursday - just two days after the Hornets' Premier League defeat to Aston Villa.
Nigel Pearson subsequently made wholesale changes and, though Kaylen Hinds' 68th-minute effort cancelled out Emmanuel Monthe's first-half opener, Watford succumbed in extra-time.
Substitute Paul Mullin, who scored a late spot-kick in the first meeting between the sides, was Tranmere's hero - heading in the winner to set up a mouth-watering tie with 12-time winners United.