Antonio Conte makes only one change to his starting XI from Monday's game with Pedro in for Club Player of the year Willian missing out for yet undisclosed reasons.
Chelsea XI: Courtois; Ivanovic,Terry,Cahill,Azplicueta;Matic,Kante,Oscar;Hazard,Pedro,Diego Costa.
Subs: Begovic,Batshuayi,Fabregas,Aina,Chalobah,Moses,Loftus-Cheek
Watford XI:Gomes;Prodl,Cathcart,Britos,Holebas,Behrami,Capoue,Guedioura,Deeney,Ighalo,Amrabat
Subs:Pantilimon,Nyom,Hoban,Zuniga,Anya,Doucoure,Vydra.