Christian Pulisic boasts the ability and “typically American self-confidence” to be a £58 million ($74m) star for Chelsea, says Borussia Dortmund director Michael Zorc.
The 20-year-old playmaker has a deal in place to take him to Stamford Bridge at the end of the season.
An agreement has been reached at this stage as Chelsea were eager to fend off rival interest and secure the services of a much sought-after talent.
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He will be on their books for 2019-20 and is being backed to thrive in the Premier League by a man who has seen him mature into one of the most highly-rated young performers in world football.