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.
18 April 2015Victory giving off right signs
Milborough team eye dream result
Harrington fined at Tipperary
Balding happy with Elm spin
Junior continues on upgrade
Newmarket target for Secret
Spring back into action
Gosden has Oaks in mind for Star
Sruthan chasing Curragh repeat
'Relaxed' Tiggy raring to go
17 April 2015Forrit poised to be National hero
Irving leads Champion charge
Belardo bids for Greenham glory
Days seeking further Success
No prep plans for Malabar
McCoy's Ayr mount withdrawn
Benoist in Al Shaqab link
No Cheltenham fairytale for McCoy
Navy sinks Sefton field
Kool result for Hannon
Cape clears away to score
Fleet-footed Astaire takes Abernant
Dutch delight for Hills
Ooty Hill returns at Newbury
Stellar field declared for Greenham
16 April 2015McCoy takes on McManus at Ayr
My neck is in a mess - Condon
News set for Bath raid
Epsom an option for Dolniya
Yarmouth opening held back
Oscar nominated for Ayr raid
Time for Tiggy in Fred Darling
Titania earmarked for Curragh
Don could still pack a Punch
Navy sets sail in Sefton
Protectionist to stay in training
Rock rolls to Heritage success
Brave upsets Faydhan at HQ
McManus buys Ayr favourite Oscar
O'Brien back in the winners
Hawke delights as Turge swoops
Osaila hangs on in Nell Gwyn
Found heads Oaks squad for O'Brien
Mullins big guns set for Festival
Mullins duo on course for battle
15 April 2015Concerto tuned up for Ayr
Faydhan floored at Newmarket
Carnival show at Newmarket
Kristale primed for Lucky strike
Rookie stars in HQ gallop
Hannon duo facing Craven test
Celebrity ruled out of Guineas
Champion trio set for rematch
Treve team consider May return
Upbeat bulletin on King recovery
Galway beckons for Cantlow
Schofield set for British stint
Sgt leads by example at Carlisle
Cirrus raring to go for Ganay
Balding banks on Here Comes When
Encore chasing Newmarket Millions
Fascinating ready to Rock
Elm blossoming for Balding
Zawraq plans remain fluid
Romance stages Gwyn love-in
Faydhan facing Free examination