Diego Costa came off in the game at Hull on 22 March with a hamstring problem. He was not risked in the game against Crystal Palace on 3 May but returned to the team for the game at West Brom on 18 May.
Oscar has a thigh injury and will not play again this season, nor in the Copa America in the summer for Brazil.
Petr Cech missed the game against Liverpool on 10 May with a small injury and may return for the final game of the season, against Sunderland on 24 May.
Kurt Zouma came off during the game against Liverpool on 10 May with a knee injury and will not play again this season.
Ramires missed the game against Crystal Palace due to illness and will not play again this season.
Eden Hazard is a doubt for the game against Sunderland on 24 May having undergone urgent dental surgery.