Chelsea attacker Kai Havertz says he's feeling more comfortable in the Premier League.

The 21-year-old's performances have improved recently and he is optimistic about rediscovering his best form towards the end of the season.

"It has been a tough season. I know things have not gone smoothly. But it is normal when you first go abroad. It takes six months or longer to adapt," said Havertz.

"I think it's going well right now so I do not want to think about the negative impressions from the past.

"I am positive and hope that the coming weeks will be just as good."