Spain midfielder Saul Niguez has said "changing everything wasn't easy" as he returns to Atletico Madrid following a loan spell with Chelsea.
"I would like to tell you how I felt during this adventure. Things didn't start well at all," the Spain international wrote on social media.
"After a long time at home, changing everything wasn't easy."
Before moving to Stamford Bridge, Saul played 33 times during Atletico's title-winning campaign in 2020-21.
He made just 23 appearances in all competitions for Chelsea, starting only five games in the Premier League.
"Little by little things got better.