TicketOne has warned fans of Napoli and Real Madrid not to buy tickets from unofficial sources ahead of their much-anticipated Uefa Champions League clash.

The two teams do not play at Napoli’s 60,000-capacity San Paolo stadium until March, but tickets were put on general sale earlier this week due to huge demand and have already sold out.

However, tickets that cost between €50 (£43/$52) to €100 are being offered on resale sites for up to €10,000, according to the Premium Sport website.

With many fans of the Italian club furious at their inability to get hold of tickets for their biggest European clash in decades, TicketOne general manager Amedeo Bardelli told Radio CRC that scalpers will not be able to prosper.

He pointed out that the purchaser’s name is printed on the ticket itself, which makes it “impossible” to sell on.

“Napoli, with us, has never allowed the name change of season tickets and tickets,” said Bardelli. “The ticket is impossible to sell on the secondary ticketing sites because you must change the name to use it, which you cannot do.

“Any site that does things like that is offering a scam. The purchase times are longer compared to a concert ticket for this.”

Bardelli added that Napoli are attempting to commandeer tickets that have not been taken up by sponsors and Uefa.

“When demand is huge there are unhappy fans, but we have not had any technical problems,” said Bardelli.

“It is currently sold out. Napoli hopes to free up seats sponsors, but the available tickets are over. I understand the feelings of the fans, but they must call me if they want to talk and inquire. We are the first enemies of secondary ticketing.”