The striker again says the Blues are not treating him fairly as they hold out for more money.
He told ESPN Brazil's Joao Castelo-Branco: “I've demonstrated I care for Atletico and have interest in playing for them.
“But if Atletico and Chelsea don't come to an agreement and Atletico don't make a big effort, I can't keep on wanting to play for a club that isn't going to make a bigger effort to try and sign me.
“I know that this [big effort] will happen, but if it's to pay the amount that Chelsea want it won't be possible.
“What I know is that this offer Chelsea will get is bigger than what they paid, so I've given them something back in all senses [sporting and financial].
"When we heard that [Antonio] Conte didn't want me anymore, my agent went to find out if there was interest from Atletico for me coming back. Of course for the warmth and respect that I earned there, they showed interest.
"But they wouldn't pay a fortune. Atletico is a team growing every year, a big team, but they can't pay an extraordinary amount."