Younes Kaboul could make his Watford debut against Gillingham in the EFL Cup following his switch from Sunderland.
But fellow new signing Roberto Pereyra is awaiting a work permit having completed his move from Serie A champions Juventus.
Summer arrival Isaac Success could be involved if he can shake off a hamstring problem but Ben Watson is still suspended.
Defender Craig Cathcart is confident his side's fitness will improve over the next few weeks after they took one point from their first two league games.
``Fitness might come into it a little bit, but it's still early in the season and we're all finding our feet,'' he told the Watford Observer.
Watford v Gillingham: Preview
