Christian Pulisic is now a Chelsea player, but will spend the rest of the season back on loan at Borussia Dortmund, where he has spent his entire career so far.
The 20-year-old has signed a five-and-a-half year contract, and becomes the third American player in our history after his international team-mate, Matt Miazga, and Roy Wegerle.
Agile, quick and two-footed, Pulisic is naturally a right winger, but is also comfortable playing on the left or behind a striker.
Born in Hershey, Pennsylvania, he is the son of two former footballers, and spent time in England as a child, where he played with Northamptonshire side Brackley Town before moving back to the States.
With a number of European clubs monitoring his progress, Pulisic signed for Dortmund as a 16-year-old in early 2015, quickly rising through the academy ranks to make his senior debut a year later.
His first half-season in the Bundesliga provided nine appearances and two goals, and he became a regular under Thomas Tuchel during the 2016/17 campaign, adding more than 60 league appearances over the next two years.
A series of minor injuries have limited Pulisic’s playing time this season, but he has still made 18 appearances, scoring three times, including a Champions League winner at Club Brugge in December.
A US international, Pulisic was voted his country’s Player of the Year in 2017, and has so far earned 23 caps, scoring nine times. He also holds a Croatian passport.