Blackburn midfielders Ben Marshall and Alan Judge will return to Gary Bowyer's squad ahead of Watford's trip to Ewood Park.
The duo missed Saturday's 3-1 victory over Bournemouth but they are both in contention to feature against the Hornets.
This game looks to have come too soon for David Dunn (knee) and DJ Campbell (ankle), while Ruben Rochina (shoulder) is definitely out.
Striker Leon Best is expected to keep his place in Rovers' attacking line after scoring on his return to Bowyer's starting XI at the weekend.
Watford boss Gianfranco Zola boasts an unchanged squad.
Almen Abdi misses a sixth successive match due to his troublesome foot injury, with the midfielder having last featured in the Hornets' 1-0 defeat at Blackpool at the end of August.
Long-term absentees Nyron Nosworthy (Achilles) and Tommie Hoban (ankle) remain the only other players to sit out.
Cristian Battocchio could well have played his way into contention for a starting berth having stepped off the bench as a second-half substitute to net the late winner which sealed Saturday's 1-0 victory over Wigan.