Rennes are emerging as favourites to land Chelsea defender Fikayo Tomori.
Available next month for loan, Tomori is attracting interest from home and abroad.
West Ham and Newcastle are keen, as are Rennes.
Relations between the two clubs are in good shape after having reached an agreement for the transfer of Edouard Mendy from Rennes to Chelsea this summer.
It is also reported that West Ham and Leeds have tried their luck for some time, but to no avail.