Carney Chukwuemeka with Robert Sanchez and Trevoh Chalobah have all been ruled out with recent injuries. No exact return date provided.
The midfielder fought back while on international duty with the England U21s. It was his fifth injury of the season.
Goalkeepers and center-backs seem to be injured in training as they have not been called up for internationals and stay at Chelsea.
Other injured players include Levi Colwill- Wesley Fofana- Reece James- Christopher Nkunku- Lesley Ugochukwu and Romeo Lavia.
