Rennes coach Bruno Genesio admits they could lose Jeremy Doku this month.
The striker is seen at Manchester City as a replacement for Riyad Mahrez, who has now joined Al-Ahli.
Genesio said, "Perhaps it won't be possible, but it's part of the life of a club like ours to sell young players to prestigious clubs and for important sums.
"I think we've shown that we're capable of making up for certain departures."
Doku is also interesting Aston Villa.