Rennes goalkeeper Edouard Mendy is closing in on a move to Chelsea after they made a breakthrough in talks on Friday, which saw the 28-year-old pull out of a training session to complete talks.
Chelsea had a verbal agreement for a five-year contract with Mendy, but have found it harder to come to an agreement over a fee for their primary goalkeeping target.
The Blues' previous bid was around €20 million (£18m/$24m) and it is understood that a fee will be reached somewhere between that figure and a maximum of €28m (£25m/$33m).