The Ivorian's inclusion represents one of two changes from the Swans' stalemate with Tottenham Hotspur at Wembley a week ago, with Leroy Fer also coming into the XI.
Marco Silva has made two alterations to the starting lineup that suffered a 6-0 mauling by Manchester City last time out.
Miguel Britos remains unselectable due to suspension.
Swansea City: Fabianski; Mawson, Van der Hoorn, Fernandez; Naughton, Olsson, Clucas, Fer, Carroll; Ayew, Bony
Subs: Nordtfelt, Rangel, Mesa, Sanches, Routledge, Narsingh, Abraham
Watford: Gomes; Femenia, Mariappa, Holebas, Kabasele; Doucoure, Capoue; Cleverley, Carrillo, Richarlison; Gray
Subs: Karnezis, Janmaat, Deeney, Watson, Success, Wague, Pereyra