Round one to bookies
Bookmakers are firmly in the driving seat after the opening day.
The first five favourites were turned over starting with a shock defeat for Dunguib in the Spinal Research Supreme Novices' Hurdle.
Seen as the banker of the entire four days for many, his defeat at 4/5 had the layers jumping for joy.
A string of further reverses followed with Chief Dan George's victory at 33/1 in the William Hill Trophy proving to be a skinner for most bookies.
A market leader finally obliged when Ruby Walsh partnered Quevega (6/4) to victory in the David Nicholson Mares' Hurdle for the second year running, but it came too late to save the punters from a 5-1 drubbing.
Hayley O'Connor, of Ladbrokes, commented: "Dunguib's defeat was a God-send. The massive Irish plunge came as we'd expected and to see him beaten got us off to a brilliant start."
An estimated £10m was lost by punters on Dunguib as the layers amassed a total of £30m on a great first day for them. The trend continued with defeats for Captain Cee Bee, The Package and the gambled-on Go Native adding to punters' woes.
The latter was a big disappointment in the Champion Hurdle in which success for 9/1 shot Binocular was also a good one for bookmakers.