"Having already played a season with Chelsea I feel much more comfortable now," he said. "I have a lot more experience of The Premier League than I did at this time last year.
"I'm not playing naively like I was last season. I know what my aims are and I know what is needed from me.
"Of course there are some moments where you can't do as much you'd like. But in every game I try to improve on the last one and bring more of my qualities to the Chelsea team."