Wards Antonio Conte took another step to the title, while formally having issued for Rechnikov a ticket to the Championship.
Chelsea-Middlesbrough 3-0.
Goals: Costa, 23, Alonso, 34, Matic, 65 Chelsea: Courtois - Aspilicueta, Luis (Terry, 84), Cahill - Moses, Fabregas, Matic, Alonso - Pedro (Chaloba, 81), Azar (Willian, 71) - Costa Middlesbrough: Guzan - Fabio, Chambers, Gibson, Friend de Roone, Clayton, Forshaw (Lidbitter, 57) - Downing, Traore (Bamford, 57) - Negredo (Gested, 83) Warnings: Fabio, Bamford.