Chelsea, admitting he has found life in the Premier League tough.Havertz joined the Blues from Bayer Leverkusen in the summer and has struggled in the league, though scored a hat-trick against Barnsley in the Carabao Cup.Chelsea paid £72m for midfielder Havertz, who has registered just one assist in four Premier League matches.But the 21-year-old is confident he will get up to speed in the Prem soon having shone in the Bundesliga with Leverkusen.“It was difficult for me, especially because the Premier League is a completely different league,” Havertz told Chelsea’s official website. “It's more intense and I noticed that in the first few games.“It has gone pretty well for me recently but I think there is also still a lot of potential.
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