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 October 2014Tapestry enters Arc picture
Dettori vies for World rule in Arc
Toocool has American dream
Berkshire on the comeback trail
Dettori given Ruler role
Estidhkaar 'on target' for Dewhurst
Australia leads Champions acceptors
Martin outlines Jack ground hopes
Raiding party heads Opera runners
Autumn aim for North
Shamkala sole Arc withdrawal
Force and Power top Abbaye list
Cadeaux team mull Caulfield date
Limato set for Redcar speed test
Cape set for Concorde test
Telescope sights set on Breeders'
Power primed to storm Abbaye
Creepy excels on chasing bow
Al Kazeem given Arc go-ahead
Buick makes Ivanhowe Arc link
Martin keen on Clonard
Cirrus heads Longchamp billing
Elite aim for Irving
Ribbons run hinges on Paris ground
Quick on course for Ces date
30 September 2014Power heads Abbaye market
No fitness worries for Lemaire
Beaux plans undecided
Foret-bound Byron enjoys workout
Perfect fencing start for Minstrel
Ted takes Roscommon honours
Rain fillip for Treve Arc challenge
Speed not an issue to River camp
Signal on course to Wow in Paris
Ivawood heads Millions field
Top fillies star in Chariot race
Point primed for Abbaye assignment
29 September 2014Logic ruled out for the season
Ansgar in Foret frame
Kalann team consider Champions bid
Peslier and Mosse hunt Arc mounts
O'Brien trio set for Longchamp
High hopes for Elliott team
Berry takes the rails route
River cruises to Beresford glory
Qualify swoops for O'Brien team
Minstrel ready for chasing bow
Tiggy Abbaye run not set in stone
Angel camp ponder Darley raid
Pineau ripe for new season
Mubtaghaa suited by joy of six
Fiesolana fired up for Foret
28 September 2014Keighley holds Court for Cheltenham
Mart makes Newland's day
Spin does the trick at Ripon
Angel heaven-sent for Tregoning
Tiggy takes Cheveley gold
Lodge proves a stroll in Park
Rosalie blossoms for hat-trick
Naylor seeking Paris prize
Integral on course for Chariot
Dettori anticipating 'vintage' Arc