British sports fans are giving the Olympics football tournament a wide berth.
Around 10 million people are understood to have put their names down for the 6.6 million available tickets.
But while sports such as athletics look set to be over-subscribed - resulting in a public ballot - demand is low for football.
Wales and Scotland do not want stars like Gareth Bale and Aaron Ramsey competing in a British team for fear of jeopardising their sovereignty with FIFA.
Chief exec Paul Deighton said: "We expect to have £100m worth left to sell."