AS Monaco defender Benoit Badiashile is out of their clash with Brest.
Chelsea are in advanced talks with ASM to sign the young stopper.
And Badiashile has been left out of his side's squad for their Ligue 1 clash with Brest.
Reports have suggested that he is closing in on a January move to Chelsea as owner Todd Boehly continues his huge investment into the Blues.
A fee of around €38m is said to have been struck by the two clubs.