Rennes will allegedly demand €50m (£42.95m) if any clubs express an interest in Eduardo Camavinga.
Despite having only turned 17 earlier this month, the midfielder has established himself as a first-team regular at the Ligue 1 outfit.
However, the prospect's emergence has inevitably led to widespread attention in his signature, with Barcelona and Real Madrid said to be among the clubs monitoring the situation.
According to L'Equipe, Rennes have placed a firm valuation on the teenager's services should they receive any offers during the January window.
While Camavinga still has over two-and-a-half years remaining on his contract, there is seemingly an acceptance from Rennes that they must be realistic regarding any potential sale.
The France Under-21 international has made 16 appearances in all competitions this season.
