Chelsea manager Jose Mourinho will be looking for an instant reaction from his team after the 5-3 defeat to Tottenham at White Hart Lane yesterday.
The Blues are the heavy favourites heading into the game against Watford and Mourinho may make one or two changes to his starting line-up, as he looks to keep things fresh and give key players a rest.
The FA Cup represents a realistic chance for silverware for the Blues and a chance to put the pressure of the Premier League title race to one side.
Any player coming in has a great opportunity to show Mourinho why they deserve to be in the side on a more frequent basis, with the defence needing to be wary against a side that has nothing to lose.
Here is the potential side he could go with for the game.
Chelsea: Cech, Ivanovic, Cahill, Zouma, Azpilicueta, Mikel, Matic, Ramires, Salah, Hazard, Drogba