Marcos Alonso looks to be on his way to Barcelona after he was left out of Chelsea's squad to face Everton.
The Spain full-back reportedly said his goodbyes at the London club this week as he nears a return to his homeland.
Alonso did not travel to Goodison Park for the Blues' opening match of the Premier League season and is expected to become big-spending Barca's next recruit.
Chelsea splashed out to sign Marc Cucurella from Brighton and Hove Albion on Friday, while Ben Chilwell has returned after a long spell on the sidelines due to injury.
Thomas Tuchel also omitted Timo Werner and Callum Hudson-Odoi from his squad for the trip to Merseyside amid reports they could leave the club.
Barca president Joan Laporta on Friday said he was confident the Catalan giants would be able to register all of their new players despite claims LaLiga will require them to generate more funds.