Barcelona chiefs will make a final make-or-break offer for David Luiz this week.
Brazilian defender Luiz is a target for Barcelona who had an opening bid turned down last week.
Luiz is expected to have talks today with Chelsea boss Joe Mourinho to get assurances about his future.
Barcelona want Luiz to push for a move but Chelsea have made it clear they do not want to sell and are determined to keep him in this window.