In-form Chelsea too good for Arsenal
Diego Costa scored his ninth goal in seven Premier League games to give Chelsea a 2-0 win over Arsenal.
Chelsea took the lead in the first half at Stamford Bridge when Eden Hazard converted a penalty after he had been brought down by Laurent Koscielny.
Spain striker Costa added a second after the break when he latched on to a long pass from Cesc Fabregas and lifted the ball over Wojciech Szczesny.
Arsenal had a penalty appeal turned down, but otherwise rarely threatened.