West Ham have returned to winning ways less than 48 hours after their Boxing Day defeat by Southampton as they came from behind to beat Watford at Vicarage Road.
Watford took the lead in the fifth minute when Emmanuel Dennis was played in by Joshua King for his eighth goal of the season.
King found Dennis, who got between the West Ham defenders, but the forward had to weave his way across the box to create the angle for a shot which he struck past Lukasz Fabianski.
West Ham had been the better side since going behind and scored an equaliser in the 27th minute.