Watford host Millwall on Saturday (12:30 GMT) in a game likely to test each team's Championship play-off credentials.
After five straight home defeats, the Hornets stopped the rot with victory over Luton in their last fixture at Vicarage Road and could go level on points with the play-off places, for a few hours at least, with another victory here.
The Lions lie four points and two places back in 12th, having gone down 2-0 at home to Bristol City on Tuesday in their game in hand following Saturday's FA Cup fifth round defeat at Crystal Palace.