Chelsea manager Frank Lampard has spoken about the impact of Thiago Silva on the team.

The Blues have endured a difficult start to the Premier League, especially defensively.

However, the games where Silva has been involved are the ones where they have looked the most secure at the back.

And Lampard believes the Brazilian's experience and concentration is key to helping his relatively young team.

"Where we have conceded more goals in certain games than we would have liked this season, it is important to address those problems," Lampard told reporters, via Goal.

"You obviously address them at the back and I thought we defended the box very well today.

"Defending for me, at this level, is about concentration. Concentration is what will define defending in top players generally. What you saw in Thiago Silva today is a defender who concentrates at every moment of the game in every minute, to not just affect things for himself but affects those around him. I think that was a big plus today.

"The balance of the team is something we are constantly trying to work on. We got into some nice areas in the final third but didn't have the usual spark that we have seen already from Timo, from Kai already or what Christian can do. That is normal.

"I will make a big positive of the fact that we defended very well today, at times we had good control, but we did not have that penetration that we normally have."