Gianfranco Zola has put Fernando Forestieri straight back into the Watford attack after the forward served a one-game suspension.
Nyron Nosworthy (muscle) and Joel Ekstand (ankle) both miss out due to injuries as Watford search for just their second home victory.
For the resurgent visitors, new loanee Saido Berahino doesn't make the starting lineup, with Emile Sinclair leading the line.
Watford: Almunia; Doyley, Hall, Hoban; Cassetti, Abdi, Hogg, Chalobah, Pudil; Deeney, Forestieri
Peterborough: Olejnik; Alcock, Little, Rowe, Knight-Percival; Brisley, Ferdinand, Boyd, Bostwick, Barnett; Sinclair
