Chelsea manager Maurizio Sarri says his side have reached their mental “limit” after their top-four hopes were dented by Everton’s second-half resurgence.
The visitors dominated possession in the first half with Eden Hazard striking the post and Pedro wasting a chance from close range.
But their profligacy was punished four minutes after the break as Richarlison headed in following a corner for his 13th goal of the season.
And the visitors’ woes increased on 71 minutes when Richarlison was brought down in the area by Marcos Alonso, with Gylfi Sigurdsson scoring the rebound from his own penalty.
Gylfi Sigurdsson doubled Everton’s advantage after having his penalty saved by Chelsea goalkeeper Kepa Arrizabalaga
The Iceland international followed up for the rebound and put the ball into the half-empty net to double Everton’s lead