Watford's defeat by Millwall on Saturday ended a three-match unbeaten run and they are six points off the play-off places as they prepare to host Swansea City on Wednesday (19:45 GMT).
The Swans are on their own three-game streak without defeat which has included wins over Blackburn and Middlesbrough.
Watford have won just two of their past eight league games against Swansea City (D1 L5), scoring more than one goal in just one of those matches.
Swansea City have lost just one of their past four away league games against Watford (D1 L2), a 2-0 defeat in May 2021.