Antonio Rudiger, Ethan Amapdu, Danny Drinkwater and Marcos Alonso were all missing from Chelsea’s training session ahead of their second leg clash with Slavia Praha.
Dominic Fifield reports that the four players were not present as Maurizio Sarri put his squad through their paces ahead of the game on Thursday night.
Chelsea are training on Wednesday afternoon as they prepare for the second leg, in which they hold a narrow 1-0 advantage.
It was Alonso who scored the only goal of the game in the first leg, but it now looks like Emerson could be given the nod on Thursday.
Rudiger was not expected back in training, while Drinkwater continues to watch on from the sidelines this season.
Gary Cahill was said to be present at training and now looks like he could be given a run as Chelsea look to book a place in the semi-finals of the Europa League.
