Pedro will miss Chelsea’s Premier League trip to Crystal Palace on Sunday due to a hamstring injury.
The Spain forward limped out of the 2-1 Boxing Day win at Watford, and could now be sidelined for two weeks.
Callum Hudson-Odoi will face a late fitness test after picking up a hamstring concern of his own at Watford, while Alvaro Morata is fully fit.
Provisional squad: Kepa, Caballero, Rudiger, Alonso, Fabregas, Jorginho, Kante, Barkley, Hazard, Loftus-Cheek, Kovacic, Giroud, Zappacosta, Willian, Cahill, Christensen, Azpilicueta, Morata, Luiz, Emerson Palmieri, Ampadu, Hudson-Odoi.
