The home side lost to Nottingham Forest last time out and will be looking to turn their form around after four successive defeats.
The Hornets come into the game on the back of a 2-1 win at home against Derby County.
Tony Mowbray could be without eight first teamers when the two sides meet on Wednesday as Bradley Johnson, Daniel Ayala, Joe Rankin- Costello, Lewis Holtby, Tom Trybull, Derrick Williams and Scott Wharton remain out. The Blackburn boss could also be without Sam Gallagher and Ryan Nyambe after the pair were forced off in their last game.
Kaminski, Harwood-Bellis, Lenihan, Branthwaite, Bell, Travis, Davenport, Elliott, Dack, Brereton, Armstrong.
Bachmann, Femenia, Troost-Ekong, Cathcart, Masina, Chalobah, Hughes, Cleverly, Sarr, Pedro, Sema.
Ones to watch
The ex Newcastle forward has been in terrific form for Blackburn this year, he has scored 19 goals and contributed three assists in the Sky Bet Championship.
The influential attacker has been the key to Blackburn’s success in the first half of the season, and is always a dangerous player and always one for the opposition to watch out.
The Brazilian striker made his move to England in the summer from Fluminense, and adjusted brilliantly to life in the Championship.
Pedro has scored eight goals and contributed one assist in the league so far, and his turn of pace and eye for goal will mean the Blackburn Rovers defence will have to be on their game.
The two sides last met in October and Watford ran out 3-1 winners in an entertaining affair. In the last five meetings it is Watford who edge it, with two wins, there have been two draws with Blackburn winning one.
How to watch
Due to the current national lockdown, there will be no fans in attendance at Ewood Park. This means the game is available on iFollow through Blackburn and Watford’s respective websites, with passes priced at £10.
The game kicks off at 19:45 GMT on Wednesday 24 February 2021.