Chelsea boss Thomas Tuchel substituted Romelu Lukaku in Chelsea’s 1-0 victory over Brentford on Saturday with 13 minutes of the game left.
Explaining his decision to take off Lukaku, Tuchel said: “I felt him a bit tired today.
“Altogether we did a very strong 60 to 75 minutes, including Romelu and Timo. I am not concerned as I felt him a bit tired and then isolated because we were defending as a block too deep.
“Both of then, Timo and Romelu, were too far away to help us and escape the pressure.
“That was the problem today. But I have no concerns.
“Normally, the best thing is he scores but he is very unselfish at the moment, looking for Timo in good situations, and when we had him in the situation it was a close offside decision.”