The Pilgrims play host to Racing Club Warwick on the Jakemans Community Stadium 3G – and were beaten 6-1.
Captain Reece Coy scored United's solitary goal.
Boston: Tyler Griffin (Finley McDaid 70), Reece Coy, Alex Van-Tam, Kye Rook, Joel Smith, Daniel Fisk, Cody Elgie, Charles Doble (Harry Gunthorpe 87), Stephen Pereira (Jaydon Sargent 90), Matas Gecas (Daniel Walsh 90), Kiaran Grove (Joe Todd 62).
Referee: Peter Brothwell.