Chelsea boss Maurizio Sarri is ready to move for Borussia Dortmund attacker Christian Pulisic.
The Daily Mail says Chelsea already have an agreement in place for the Germany international.
The 20-year-old American has indicated that he wants to join Chelsea in a deal worth around £60million next summer and it could be confirmed as early as next month.
However, it will raise further doubts over the future of 18-year-old Callum Hudson-Odoi, who is being pursued by Bayern Munich and whose contract ends in 2020.
Chelsea will stress that Pulisic will play on the right, with Hudson-Odoi predominantly left-sided.
And managing director Marina Granovskaia would be reluctant to let Hudson-Odoi leave as he is seen as the player most likely to be the first of the Roman Abramovich era to progress from the academy to being a first-team star.