Virtual Grand Nationalpublished at 11:25 British Summer Time 4 April 2020
The Grand National is one of the biggest races in the world but Saturday's actual event has been called off. In its place, though, will be a televised Virtual Grand National.
Forty runners that would have been most likely to line up will take part, using CGI technology and special algorithms.
Tiger Roll had been due to seek an unprecedented third win in the big race at Aintree before it was cancelled because of the coronavirus pandemic.
Bookmakers have odds, and profits will go to NHS Charities Together. The race is being broadcast in the UK from 17:00 (16:00 GMT) on ITV1.