Watford:
The 'Hornets' go in to this game flying high, after winning all four of their opening games to the Premier League season including a win aghainst Tottenham in their last match. Roberto Pereyra will look to continue his run of scoring goals at home in this one.
Gerard Deulofeu is still out with a groin issue and Tom Cleverley won't be fit to face his former club because of an achilles injury. However, Nathaniel Chalobah could make just his second appearance in over a year after sustaining an injury to his knee.
Manchester United:
Mourinho's men have had a much different introduction to the new Premier League season, after two shock defeats to Brighton and at home to Tottenham. Romelu Lukaku will look to capitalise on a good run of form that's seen him score in each of his last three games for club and country.
The 'Red Devils' will be without several players such as Ander Herrera, Phil Jones and Marcus Rojo. Marouane Fellaini is a doubt for this one while Luke Shaw's match fitness is also unknown, after he suffered concusion with England.
Watford boss Javi Gracia on the current state of Manchester United:
"For me it's a very good team. Last season they were second in the table and are a very good team with a very good coach and I know it will be a very demanding game.
"At this moment playing at home we have the confidence to compete and to try and get points."
Manchester United manager Jose Mourinho on Watford's incredible start to the season:
"It’s clear (the test). Four matches, 12 points. We know that three of these matches were at home, so in relation to the 12 points maybe we can speak about a little advantage in relation to other teams with two home and away.
"12 points is great for them. Good victories at home, strong performances, congratulations to Javi and to the players and to the club overall because it was a very good start."
Did you know?
Man Utd have won 11 of their last 12 matches against Watford in all competitions.
Since Javi Gracia's first home game in charge in February, Watford have won more Premier League points (23) in home fixtures than any other team.
Jose Mourinho has won five of his six Premier League encounters with Watford (L1), including each of the last three.
Prediction: 1-1
Form:
Possible lineups:
Watford: Foster; Janmaat, Cathcart, Kabasele, Holebas; Doucoure, Capoue, Hughes; Pereyra, Gray, Deeney.
Man Utd: De Gea; Valencia, Smalling, Lindelof, Young; Pogba, Matic, Fellaini; Lingard, Lukaku, Sanchez.