Chelsea boss Thomas Tuchel insists he's not worried about Romelu Lukaku's form after another quiet performance in victory over Brentford.

Tuchel has remained relaxed about Belgium hitman Lukaku's recent barren run however, instead praising the 28-year-old's selfless approach.

“I am not concerned as I felt him a bit tired, and then isolated because we were defending too deep as a block," said Tuchel.

“I felt him a bit tired. Altogether we produced a very strong 60 to 75 minutes, including Romelu and Timo (Werner).

“Both of them, Romelu and Timo, were too far away to help us escape the pressure. That was the problem, but I have no concerns.

“Normally the best thing is that he scores but he is very unselfish at the moment, looking for Timo in good situations.

“And we had him in the situation (to score), it was a close offside decision."