Injury to Simon Mignolet gives Bogdan the opportunity to stake his claim for the No. 1 shirt as Klopp once again alters his lineup significantly.
That means Christian Benteke and Divock Origi have to settle for roles among the substitutes.
They join Kolo Toure, Connor Randall, Joe Allen and Jordon Ibe on the bench for what is a crucial tie for the Reds during this festive period.
Kick off at Vicarage Road is 1.30pm (GMT), live on Sky Sports 1 in the UK. Our usual matchday live blog will begin at 1pm.
Liverpool: Bogdan; Clyne, Skrtel, Sakho, Moreno; Henderson, Lucas, Can; Lallana, Firmino, Coutinho
Subs: Fulton, Toure, Origi, Randall, Benteke, Allen, Ibe
Watford: Gomes; Nyom, Britos, Cathcart, Ake; Capoue, Watson; Abdi, Deeney (c), Jurado; Ighalo.
Subs: Arlauskis (GK), Holebas, Behrami, Guedioura, Anya, Diamanti, Oulare.
WATFORD vs. LIVERPOOL