Tony McCoy rides Sunnyhillboy and not ante-post favourite Quantitativeeasing in the Spinal Research The Atlantic 4 Gold Cup at Cheltenham on Saturday.
Both are owned by his retainer JP McManus but McCoy has opted to partner Jonjo O'Neill's charge who carries 10st 4lb, close to the champion jockey's minimum weight. Barry Geraghty rides Quantitativeeasing for Nicky Henderson.
A maximum field of 18 have been declared with Willie Mullins' Quel Espirt the notable absentee.
Martin Keighley's Havingotascoobydo, another leading fancy, hasn't made the cut and is the first reserve.
Paul Nicholls' Woolcombe Folly will carry top weight, although Ryan Mahon can take 3lb off.
Nicholls also runs Ghizao, the mount of Ruby Walsh, part-owned by race sponsor Andy Stewart and David Johnson.
Johnson will also be represented by David Pipe's Paddy Power winner Great Endeavour, while Stewart 's colours are carried by Richard Rowe's Tatenen and Nick Gifford's Nomecheki.
Pipe also runs I'msingingtheblues, Salut Flo and Matuhi.
Medermit, sent off 11-4 favourite for the Arkle last season, represents Alan King who is still looking for his first win in the race.
The two Irish challengers are Dessie Hughes' Roberto Goldback and Tom Taaffe's Finger Onthe Pulse.
Ferdy Murphy's Divers, third in the Paddy Power Gold Cup, will line up again and Calgary Bay, Roudoudou Ville, Sunnyhillboy and Mad Moose complete the 17-runner field.