Diego Costa has been advised by Atletico Madrid to end his Chelsea exile in Brazil and return to help push through a January move back to the Spanish capital, reports the Mail.
The Spain international has refused to return to the Blues' Cobham base this summer after being frozen out of Antonio Conte's first-team plans.
The 28-year-old has complicated his exit by insisting on an Atletico return, which failed to be finalised before Friday's La Liga transfer deadline.
Los Colchoneros aren't prepared to meet the Premier League champions' £50 million valuation, though they have offered £40 million for their former striker, with a prompt return to training now recommended to ease tension ahead of a January move.