Nemanja Matic hails Diego Costa's impact at Chelsea

Chelsea midfielder Nemanja Matic has talked up the impact that Diego Costa has made since his arrival at the club.

The Spain international, who was signed for £32m from Atletico Madrid in the summer, has scored seven goals in four games and was awarded the Player of the Month gong for August.

Matic told Chelsea's official website: "Diego is very important for us, he's a great striker, he scored three goals [against Swansea City] and that's why Chelsea bought him.

"I hope he will continue to score goals; he works very hard on the pitch, not only offensively but defensively as well."

Costa is currently top of the Premier League scoring charts.