Thomas Tuchel was delighted to see Kai Havertz step up against Lille on Tuesday.
The German was picked ahead of Romelu Lukaku and scored the opening goal in a 2-0 victory, putting Chelsea in a commanding position in the Champions League last-16 tie.
"For Kai I'm very pleased because Kai has been very strong for a few weeks now," Tuchel said.
"He really stepped up and the effort is immense, the work-rate is immense, the areas of the pitch that he covers for us is very good.
"We had a very aggressive high line today with the offensive three players together. The formation was to have intensity and high work-rate consistently throughout the whole match."
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