Milan have reportedly warned Montpellier they will either pay €6.5m for Mapou Yanga-Mbiwa or wait to sign him on a free transfer next year.
The centre-back is the prime target to replace Thiago Silva and has only a year left to run on his current contract.
However, Montpellier publicly blasted the initial €6m offer, claiming they would have to “triple it” in order to even begin negotiations.
According to Sky Sport Italia, Milan have warned they will go no further than €6.5m.
They hope to force Montpellier’s hand with the fact Yanga-Mbiwa will be a free agent next summer and his desire to join the Rossoneri.
Meanwhile, it is also reported that Montpellier have already found his replacement in the form of Daniel Congre from Toulouse for €5m.