The 21-year-old Argentinian joined Marcus Rashford, Tyrell Malacia, Antony, and Jadon Sancho in submitting a transfer request last month.
The blues recently signed Dortmund’s Jamie Gittens for a £50m deal, a player who plays in a similar role.
Chelsea are also pursuing RB Leipzig’s Xavi Simons, a Dutch international who can also play on the left wing.
