Watford has sacked his manager Xisco Munoz after 10 months.
The 41-year-old Spaniard helped promote promotion to the Premier League last season after joining in December 2020.
Watford are 14th with seven points from seven games and Munoz’s last game was Saturday’s 1-0 loss to Leeds United.
“The board believes that recent performance strongly points to a negative trend at a time when team cohesion should visibly improve,” the club said.
“The Hornets will always be grateful to Xisco for the role he played in securing last season’s promotion and wish him all the best for his future football career.
“There will be no further club commentary available until the imminent announcement of a new head coach.”
Watford has had five managers in two years and there is no indication who will replace Munoz.
The boss is the first Premier League manager to be fired this season.
Watford had started their first season back in the top flight well with a 3-2 win over Aston Villa in their opener.
The club also knocked Crystal Palace out of the Carabao Cup in the second round.
However, results began to deteriorate with just two league wins in the seven games played this season and they exited the Carabao Cup in the third round with a 3-1 defeat to Stoke in September.
Watford will play against Liverpool in a league game next time after the international break on October 16.