Rennes have reportedly told Chelsea that it will take a bid of at least £30m to prise Edouard Mendy away from the club this summer.
Chelsea have identified the Senegal goalkeeper as a possible replacement for Kepa Arrizabalaga, who ended last season with the worst save percentage in the Premier League.
The Blues are understood to have seen two offers rejected for Mendy already, and The Telegraph reports that they have now been told that Rennes want a £30m approach.
The most expensive of those deals - the club-record signing of Kai Havertz from Bayer Leverkusen - is expected to go through in the coming days, meaning that a move for Mendy could take them close to the £250m mark this summer.
The 28-year-old shot-stopper has kept 13 clean sheets in 34 appearances for Rennes since joining the Ligue 1 outfit last year.