Zaidpour dug deep to claim the Bar One Racing Hatton's Grace Hurdle at Fairyhouse on an afternoon when Willie Mullins landed a treble.
Ruby Walsh's mount showed a great attitude in going past fellow joint-favourite Voler La Vedette going to the last, after the star mare had moved smoothly to the lead two out, where long-time leader So Young made a mistake.
Zaidpour soon mastered Voler La Vedette, who lost second on the run to the line as Monksland finished well. The winning distance was two and a half lengths.
A clash with Big Buck's looks in the offing for the six-year-old at Cheltenham in March.
Mullins said: "I think he's improved, so we'll go along those lines (Ladbrokes World Hurdle). I doubt he'll take on Hurricane Fly next, but he'll be entered in all those races. He has enough speed for two miles, but he has plenty of stamina, too.
"It was a fantastic result and he's stronger this year. He's good enough to run in a Champion Hurdle, but the obvious thing would be to go over a longer trip.
"It depends on what runners we have, but I'd imagine he'll go further - over two and a half or three miles. Himself and Thousand Stars fall into the same kind of bracket.
"I have to give a lot of credit to Virginie, who rides him out all the time. She does a lot of slow work on him and keeps him right as he had shoulder trouble when we got him."
Stan James cut Zaidpour to 20-1 from 50-1 for the World Hurdle. Spokesman Joseph Burke said: "Zaidpour won his second Grade One in good style and has been cut for a host of Cheltenham objectives. He is 20-1 (from 50-1) for the World Hurdle and 33-1 (from 50-1) for the Champion Hurdle."
Mullins also won with Arvika Ligeonniere in the Drinmore Novice Chase and completed the treble with Outlander, who stayed on strongly to score under the trainer's son Patrick in the concluding bumper.
24 July 2014Kennedy floored on Leopardstown bow
Kennedy floored on Leopardstown bow
Candy sweet on hot-shot Alonsoa
BHA confirms seventh morphine case
Big guns in Irish Champion frame
Duo added to Irish Leger
Carroll 'surprise' at morphine link
Farraaj sidesteps York return
Classy entries for Champagne
Stars align for Sussex showdown
Kiyoshi dips in grade for Valiant
Gosden waits on Eagle call
Horsted heads International runners
Two more trainers in morphine case
Top field seek George glory
Midgley delivers Silva service
Trainer caught up in morphine case
Lyons takes aim at Tyros double
Sunset shines for Her Majesty
Raydara facing Flash test
Prize boost for Newmarket heats
Field pitch perfect for Ascot raid
Gosden team among Leger entries
Goodwood target for Tropics
23 July 2014Feed company launches investigation
Toast team offer American excuse
Galway on Panama agenda
Panther sidesteps George date
Toast team offer American excuse
Hughes' duo primed for Plate
Cooper hearing concludes
Edison set for Galway glory bid
Ferguson plotting Galway raid
Queen's Estimate tests positive
Moonlight shines at Musselburgh
Taghrooda could go off favourite
Signal pointed at Phoenix
Course specialist in Ascot return
Bary plots Arc route for Spiritjim
Charlton weighs up Kazeem options
Varian seeking York glory
High hopes for Odeliz
22 July 2014Strangeway targets Galway riches
Grade One status for Mares' event
Halford retains Certerach faith
HRI unveil 2015 plans
Buick on Ascot weather watch
Minella to take Plate test
Scudamore banned for course blunder
Toscanini team mull options
Faydhan team in no rush
Fast Kaar given Dewhurst target
Pique Sous confirmed for Galway
Hannon team cool on Nunthorpe bid
Channon excited by Amralah progress
Haggas expects Hanagan to ride Tag
21 July 2014Ebor the Clever choice for Cookie
Deauville mission for Fiesolana
Chicquita in Yorkshire Oaks frame
Magical Moore shines again
Kool result for Hannon
Guest considers Memory options
Euro stays with Botti
Ascot on Moohaarib agenda
Injury blow for Boistron team
Encke set for Glorious return
No hurry for Tiggy target
No rush for East aim