Manchester United have lost three consecutive games in all competitions after going down late on at Watford.
Juan Zuniga scored 53 seconds after coming on and Troy Deeney netted a stoppage-time penalty as Watford beat Manchester United 3-1 on Sunday, condemning Jose Mourinho's men to a third consecutive defeat.
A dramatic opening period saw Odion Ighalo miss an open goal for Walter Mazzarri's side, before Paul Pogba struck the crossbar from long-range for the visitors in the Premier League clash at Vicarage Road.
Etienne Capoue then put Watford ahead with his fourth goal of the season, but Marcus Rashford – handed his first Premier League start of the campaign – equalised after the break.