Sevilla chief Monchi admits Chelsea target Jules Kounde is up for sale.
The London Evening Standard says the two clubs have been in talks over the centre-back.
Kounde has a £68million release clause but Chelsea are unwilling to meet the figure and could offer a player in part-exchange.
Sevilla are in no pressure to sell thanks to Bryan Gil's move to Tottenham but sporting director Monchi has confirmed Kounde could leave for the right price.
"Many clubs have asked for Kounde," he said. "Of course there's interest but no official bid is on the table.
"I don't know what's going to happen ... we will sell if an important bid arrives, this is our policy to improve the team."
