Chelsea are eyeing Valencia fullback Joao Cancelo.
Don Balon says Valencia are aware of Chelsea's interest and are bracing for a January bid from the Londoners.
The young Portuguese is also being linked with Barcelona this week.
Chelsea boss Antonio Conte remains unconvinced by his fullback options and is keen on adding Cancelo to his squad in midseason.
Conte has been assured by Chelsea owner Roman Abramovich he can count on a massive budget for the winter market.