Everton dented Chelsea's hopes of UEFA Champions League qualification with a 2-0 triumph at Goodison Park courtesy of goals from Richarlison and Gylfi Sigurdsson.
The visitors were seeking a victory to draw level on points with fourth-placed Arsenal but succumbed to a fine second-half display by Everton.
Chelsea dominated the opening stages, with Eden Hazard curling a shot on to the post, but missed a series of chances.
Marco Silva’s side punished the west Londoners when Dominic Calvert-Lewin’s header was parried by Chelsea goalkeeper Kepa Arrizabalaga. Richarlison reacted first to head on 49 minutes for his 12th league goal of the season.
Jordan Pickford, making his 100th Premier League appearance, denied Gonzalo Higuain with a smart reaction save, before Everton doubled their lead.
Richarlison beat Marcos Alonso to a loose ball and drew a foul. Sigurdsson was relieved to convert the rebound after Kepa had saved his initial 72nd-minute penalty.
Chelsea’s fourth loss in their last five away PL matches keeps them in sixth place on 57 points, while Everton climb to 11th on 40 points.