Chelsea will intensify their pursuit of Christian Pulisic if Willian leaves this summer, reports the London Evening Standard.
Borussia Dortmund are willing to cash in on the United States international but only if they receive in excess of £60m for his services.
Chelsea have only signed Jorginho and Rob Green this summer and new manager Maurizio Sarri is determined to get some more faces in before the start of the season.
Sarri wants to overhaul the club’s offensive options and is targeting a reunion with Juventus striker Gonzalo Higuain.
Chelsea may also have to strengthen the right side of their attack with Willian constantly linked with a move away from Stamford Bridge.
The Blues rejected three bids from Barcelona for the Brazil international before the Spanish side dropped their interest, but now Real Madrid have emerged as shock suitors for the 29-year-old.
Chelsea are determined to command in the region of £70m for Willian and will use that money to bankroll a move for teenage sensation Pulisic.
The 19-year-old has previously been linked with a move to Manchester United and Liverpool after emerging as one of the best prospects in the world.