Tickets for the Wimbledon men's final were being sold for thousands of pounds as Murray Mania sweeps the nation.
Tickets for Andy Murray's semi-final on Friday were changing hands for up to £4,500, with the average selling for £3,500.
And online ticket marketplace Viagogo said at one point tickets for Sunday's Grand Slam final were being offered for up to £15,000 each, although prices fluctuate constantly.
Viagogo said there was a 20% increase in searches on the site for finals tickets after Murray booked himself a place in Friday's semi-finals, and predicted that prices could get as high as £45,000. Last year tickets to the finals were trading up to £12,000 per ticket during the semi-final stage, Viagogo said, with the highest sold for £6,000.
A spokeswoman said there has been a considerable rise in listing price for tickets on the site since Nadal was knocked out so early in the tournament.
Semi-final tickets have sold for an average of £3,500 this year, with the highest sold for £4,500, Viagogo said, compared to last year, when the highest offer for a semi final ticket was £3,500 and the highest actually sold for £2,880.
Edward Parkinson, director of Viagogo UK, said: "As a marketplace ticket prices fluctuate as sellers vary their asking prices. A pair of tickets for the men's final were listed at £15,000 this morning but were down to an offer price of £10,000 this lunchtime.
"However, there are now tickets listing for just over £13,000 which demonstrates the constant flux of the marketplace. Tickets for last year's men's final were being offered for up to £25,000 for a pair.
"Since Murray won the quarter finals we've seen a 25% increase in the price of listed tickets. If he gets through to the final it will be history in the making and we could see tickets being offered for up to £45,000 for a pair."
William Hill put Murray at 4/9 to beat Jo-Wilfried Tsonga to make it into the final. But they also put him at 10/11 to finish the tournament as runner-up. Spokesman Rupert Adams said: "There can be no doubt that the public and punters are getting behind Murray to win Wimbledon this year and hopefully victory on Sunday will open the floodgates for major victories."