After trailing to Conor Green’s early strike, Billy Hodgkiss’ dramatic stoppage time header had sent the match to extra-time and when Louis Saebe struck five minutes into the additional period, United were on the brink of a cup upset.

Ollie Roome struck for the Stags in stoppage time of extra-time though and Town eventually prevailed 3-2 on penalties.

Corey Newman and Liam Moran successfully converted spot-kicks for the Pilgrims, but Daniel Worthington, Dominic Goddard and Miles Lynch were unable to replicate and Town squeezed through.

Boston (4-3-3): Jamie Bradley; Daniel Worthington, Billy Hodgkiss, Joe Cain (Daniel Moulds 75), Jack McCallum; Miles Lynch, Liam Moran, Corey Newman; Dominic Goddard, Louis Saebe, Bradley Easey (Jack Dykes 80). Subs (not used): Ollie Price, Steven Dovey, Scott Floyd.

Referee: Oliver Bickle.

Attendance: 176.