Wimbledon finals tickets are going on sale for thousands of pounds as touts try to cash in on Murraymania.
One pair of Centre Court tickets for the men's final attracted a bid on online auction site eBay of £2,500.
Another pair, with a face value of just £200, attracted bids of £1,260.
Two tickets put on the auction site for £5,000 have so far had no takers.
Sellers are thought to be trying to take advantage of the excitement surrounding a possible final between Roger Federer and Andy Murray.
It is against the rules of the All England Club to sell on non-debenture tickets. Of the 15,000 seats on Centre Court, 2,300 are debentures.
A Wimbledon spokesman said: "The club takes active steps to monitor and control sales including those made via shops and internet sites such as eBay. Sellers of non-debenture tickets will be contacted and injunctions taken out against those who do not co-operate and act contrary to the club's ticket policy."
Wimbledon officials have also been trying to crack down on fraudulent websites.
One site being looked at was onlinewimbledontickets.com, which claims to offer men's finals tickets for £2,100, and presents itself as if it is an official Wimbledon site.
The Wimbledon spokesman said: "We have contacted the Metropolitan Police's economic crime unit. They are working with us on that to see if we can get the site closed down."
