Nahki Wells came off the bench in the 86th minute as Bristol City endured a torrid afternoon in Hertfordshire where they were stung 6-by Kane Crichlow’s Watford teammates.
Ken Sema put Watford ahead as early as the second minute to set the tone of the game at Vicarage Road, his first of two first-half goals.
Ismaïla Sarr scored two of his own, with Will Hughes on the scoresheet with a deflected long-range drive.
And substitute Philip Zinckernagel added the sixth goal of the game in stoppage time to round off another disappointing journey on the road for the Robins.
JUSTIN DONAWA
Justin Donawa and his Solihull Moors teammate's clash with Barnet FC were postponed due to a frozen pitch at the SportNation bet Stadium.
JONTE SMITH
Jonte Smith and his Woking teammate's match against Torquay United was postponed, owing to a frozen pitch.
KEZIAH MARTIN
Keziah Martin’s Kidderminster’s teammate's home match against Darlington was postponed due to a frozen pitch.