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.
1 September 2015Cadeaux leads Cup contenders
Turner calls time on riding career
Pendleton so close to dream success
Whitman lifts Trophy for Johnston
Hobbs stars in Kempton entry
Mullins hails 'legend' Hurricane
Super Fly bows out
Belardo has six appeal - Varian
Time called on Telescope career
Charline chasing Curragh cash
31 August 2015Haydock option for 'Frankel' winner
Hurricane Fly: Best moments
Maguire making good progress
Channon seeks Divine intervention
More injury woe for unlucky Russell
Balios finished for the year
Reason back in firing Line
Newton Abbot washed away
Beloved bounds to Supreme success
Ton-up for De Sousa
Approval for new Yarmouth track
Hint takes Cambridgeshire glory
Bocca back in business
Leger hope Sumbal beaten in France
Tower-ing performance from Williams
O'Brien works his Magic again
All eyes on Pendleton at Ripon
30 August 2015Beloved rules supreme at Goodwood
Arm injury woe for Russell
Beacon shines for O'Brien
Botti banks on Binzart
Harrington ponders Jack reverse
Tullius revved up for Joel Stakes
Speculative in frame for Ayr raid
Moon dazzling for Irish Leger bid
Ivory backs Twin to peak at Donny
Golantilla 'a natural' over fences
Flintshire strikes at Saratoga
Retirement considered for Pharoah
Cummings 'a giant of the sport'
Keen Ice claims Pharoah scalp
Racing lands Winter win
O'Brien family enjoys Wexford wins
Goodwood Celebration for Kodi team
Polybius takes Hopeful honours
Twisler on the march
Rene lands Goodwood riches
Maarek shoots to Bullet victory
Hawk swoops in Prestige
29 August 2015Death of top trainer Bart Cummings
Kodi Celebration for Cox
Deegan hopeful of good Sho
Titania looks to 'step up' in Dance
Gosden youngster impresses at HQ
Ascot date for Dartmouth
Bolger seeking Curragh Smash n grab
Death of northern stalwart Charnock
Ground key for Weld big guns
Panther pleases in Newmarket work
Icon eyeing Prestige prize
Buratino in Middle Park frame
Cox hoping for Kodi Celebration