Chelsea boss Graham Potter was delighted after their 1-0 win against Crystal Palace.
Havertz scored the only goal of the game on Sunday.
Potter said, "Today we are happy for the three points. Overall we played quite well, they had their moments as well but today was about getting the victory - park it as three valuable points against a team that was pushing as well.
"We try to play well and I thought at times we did, you have to understand the context of the situation we are in so it isn't going to be sensational football all the time. The boys have worked hard."
On Havertz, he said : "He worked the line really well. He has pushed and pushed, I am pleased for him to get the winning goal."
On new signing Mykhaylo Mudryk, the manager concluded: "He is a young player with exciting quality in the final third. He is very fast and direct and I think the crowd will like him."