Chelsea manager, Thomas Tuchel, has admitted he was worried about his team’s energy during the first half of their 2-0 win over Arsenal on Sunday.
Romelu Lukaku opened scoring for the Blues on his second debut, before Reece James grabbed are second.
In the second half, Arsenal threatened Tuchel’s men but failed to score.
However, Tuchel told Sky Sports that he was disturbed watching his side in the first half.
He said: “I had the feeling in the first half we lacked a bit of sharpness and activity.
“We got in some moments a bit passive. I think we had a long training week and we trained very, very hard, double sessions.
“So I got the feeling we were a bit leggy. In the second half, we overcame some minutes in the beginning and then we controlled it very very very good.
“We created some chances, I think we deserved to win, but there’s still room to improve.”