Atletico Madrid's club president Enrique Cerezo has informed Chelsea boss Thomas Tuchel on the best way to keep Saul Niguez happy.
The midfielder has signed for the Stamford Bridge club on deadline day, sealing a loan agreement.
Chelsea have the option to buy Saul for roughly £30 million at any stage of the agreement.
"Saul was not very satisfied in the position [wing back] in which he was playing and has decided to leave," Cerezo said, per the Daily Express.
"Wherever he goes he will be a great player and much loved by Atletico de Madrid."