The Hornets had a storming start to the season, and currently sit in seventh, after a 2-0 win away to Wolves last week, while Huddersfield are yet to record a win so far this season and straggle in 19th.
However Watford manager Javi Gracia has said that, in spite of having already faced the likes of Tottenham Hotspur, Manchester United and Arsenal so far this season, Gracia believes that his side's toughest test awaits them this weekend.
Huddersfield will enter the clash with confidence, as although they sit in 19th position in the Premier League, they performed excellently against Liverpool last time out, and also recorded back to back wins over the 'Hornets' last season.
Watford boss Gracia believes that the 'Terriers' have had a rotten run of luck so far this campaign, and expects a "very very demanding" home game this weekend.
In his pre match press conference for this weekend's fixture, Gracia was full of praise for his side's next opponents saying: "For me, it's the most difficult game we can play in this moment. I think Huddersfield are getting worse results than the way they are competing. They are competing well. You can see, in the last game against Liverpool for example, they play very well and competed at a high level."
He continued: ""I know they need good results and as you know they defeated us last season two times. We know it will be very difficult for us. You can see the results when they have played away. In all of them, in the four games, they have scored in all of them. Losing, drawing, but always scoring goals.
Gracia concluded: "[They are] Very, very powerful in set pieces, throw-ins, corner kicks. I'm sure it will be very, very demanding."
Watford enter this contest with a number of injury worries, and manager Gracia has conceded that the casualties are a "problem", but he is confident that the squad can pull together and make up for the absentees.
In particular, the manager has praised the impact of striker Andre Gray, who has performed well off the bench so far this season, saying: "The problem for me is to have six players out of the squad, that's the problem. I want all of them ready, all of them fit. It's not a problem to have different options. I am confident in all of them. The problem is to choose only 11.
Gracia concluded: "They can know, they can feel that I trust them, that if they don't start, they can do what Andre Gray did. He came on and helped the team a lot. That is the mentality."