Chelsea are said to be eager to turn Joao Felix's loan move into a permanent deal.
The Blues have Felix on loan from Atletico Madrid until the summer without any buy option in the agreement.
However, the 23-year-old has impressed at the Stamford Bridge club, scoring his first goal in a 1-1 draw against West Ham at the weekend.
Atleti have interest in Chelsea ace Christian Pulisic, which could lead to a cash plus Pulisic deal for Felix.
Relevo in Spain adds that Felix is also enjoying his time at Chelsea and would not mind turning it into a permanent stay.
However, he would cost a minimum of 88 million, considering the amount Atleti spent to sign him from Benfica a few years ago.