The 22-year-old cost the Champions of Europe £70 million and he struggled to live up to expectations in the first half of the season, but he improved towards the end of the season.
He scored the only in the final of the Uefa Champions League against Manchester City.
“People expect you to be the new Cristiano Ronaldo,” Havertz told Suddeutsche Zeitung. “But it won’t be that fast, everything is new and I really didn’t play my best football at the beginning.
“I felt a completely different pressure than before in Leverkusen.”
Havertz agreed that the Champions League glory will boost his confidence ahead of Germany’s clash with France at the Euro 2020 on Tuesday evening.