Millwall's Under 23s slipped to a 2-0 defeat at Watford on Monday afternoon in the Professional Development League.
Michael Folivi's double - one in each half - secured the victory for The Hornets and condemned Kevin Nugent's side to their third straight defeat.
The Under 23s will look to get back to winning ways in their next game, which is against Queens Park Rangers at Princes Park on 11th December.
Millwall: Girling, McNamara, Chesmain, Donovan, Mbulu, Rooney, Olaofe (Duncan 87'), Wicks, Leighton (Sinclair 70'), Twardek, Saunders-Henry. Subs not used: Hanson, Jackson, Debrah.