Two of the three changes have been enforced on the away side, with Hector Bellerin missing out due to a loan agreement and George Thorne returning to parent club West Bromwich Albion.
Watford: Almunia; Nosworthy, Angella, Ekstrand; Cassetti, Murray, Iriney, McGugan, Battocchio; Deeney, Fabbrini
Subs: Bond, Kyprianou, Doyley, Smith, O'Nien, Ikpeazu, Acuna
Bristol City: Parish; Osborne, Flint, Fontaine; Wagstaff, Elliott, Reid, Pack, Bryan; Emmanuel-Thomas, Baldock
Subs: Fielding, Cunningham, Carey, Moloney, Wynter, Burns, Taylor