Lyon have reportedly demanded £62.5million for teenager Willem Geubbels after emerging as one of the most sought-after talents in Europe.
Geubbels has rejected a long-term contract with Lyon with his youth terms set to expire at the end of next season.
Arsenal, Manchester City, Chelsea, Barcelona, RB Leipzig and Bayern Munich are among those believed to be monitoring the 16-year-old’s situation.
But it is Ligue 1 rivals Monaco who appear to sit in pole position after cashing in on Kylian Mbappe – whose loan deal to PSG will become permanent at the end of the season.
Lyon president Jean-Michel Aulas told L’Equipe: “If Willem thinks he can have a better career in Monaco than Lyon… Monaco bought Pietro Pellegri for €25m. We will not make gifts.
“In any case, we try to have people with ethics. My biggest regret is never to have seen Willem alone, I’ll talk to him about it directly.
“It is the end of his contract in 2019. If Monaco makes an offer of €70m we will be disappointed because we believe [in Geubbels] a lot.
“We are reassured by his valuation.”
The France Under-18 international became the first player born in the 21st century to make an appearance in Ligue 1 when he made his debut at the beginning of the season.
He is also the youngest ever player to make a Europa League debut after coming off the bench against Atalanta.
Lyon had been hoping to secure the youngsters future at the club after his development through the academy.
But their “big offer in terms of signing bonus and salary” was snubbed by Geubbels and his father.
The speedy attacker is capable of playing on the wings or as a forward and has been compared fellow Lyon academy graduates Alexandre Lacazette and Karim Benzema.