Manager Quique Sanchez Flores confirmed Amrabat, who completed his £6million move from Malaga earlier this week, will be involved. Goalkeeper Costel Pantilimon, a new signing from Sunderland, is also likely to be included in the matchday squad.
Defenders Tommie Hoban (groin) and Joel Ekstrand (knee) remain unavailable.
Watford (from): Gomes, Britos, Prodl, Holebas, Nyom, Abdi, Jurado, Watson, Capoue, Deeney, Ighalo, Pantilimon, Cathcart, Ake, Ibarbo, Anya, Paredes, Guedioura, Behrami, Amrabat.