Eden Hazard and Diego Costa send Chelsea 10 points clear with win at West Ham

Eden Hazard and Diego Costa were on target as clinical Chelsea swatted aside West Ham 2-1 to take a 10-point lead at the top of the Premier League.

Two of Chelsea's three Premier League defeats this season were away London derbies - to Arsenal and Tottenham - and West Ham beat the Blues in the EFL Cup in a match marred by crowd trouble at the London Stadium.