Arsenal and Liverpool have been told to cough up €20million if they want to sign Lyon goalkeeper Hugo Lloris this summer.
And clubs showing interest in the France international have been told they have until July 15th to complete a deal.
Lyon revealed last weekend that Lloris will be allowed to leave the club this summer providing their valuation is met.
It is believed the Ligue 1 club are ready to sell one or more of their more valuable players this summer to help balance the books after missing out on Champions League football for next season.
Reports over the past week have suggested Liverpool are keen on signing Lloris as Pepe Reina continues to be linked with a move to AC Milan, while reports in France earlier this week claimed Arsenal are ready to make a move to sign the 25-year-old.
However, Lyon president Jean-Michel Aulas insists a deal will have to happen in the next fortnight.
"A certain number of players were not good enough last season and will leave or at least be placed on the transfer list," Aulas toold the club's official website.
"Hugo told me he would like to leave if an offer comes in from one of the biggest five clubs in Europe.
"If one of these clubs makes an offer that matches his market value, in other words 20 million Euros then he can go.
"If there is no offer before July 15 he will remain at the club for the coming season.
"For the moment there has been no offer from Arsenal or anywhere else."