Annie Power has been installed the market leader among six runners for this year's Doom Bar Aintree Hurdle.
The Willie Mullins-trained mare became the first in more than two decades to claim Champion Hurdle glory at last month's Cheltenham Festival.
The eight-year-old faces a challenge from My Tent Or Yours, stablemate Nichols Canyon and winner of the 2014 renewal, The New One.
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Camping Ground and Court Minstrel make up the field.