Sizing John came out on top after a pulsating climax to the Coral Punchestown Gold Cup.
Jessica Harrington's Cheltenham Gold Cup hero was the 9-10 favourite to follow up on home turf and did so in the most dramatic style in the hands of Robbie Power.
The Mark Bradstock-trained Coneygree, making just his third appearance since winning at Cheltenham two years ago, took the field along for much of the extended three-mile journey and he remained in front rounding the home turn.
Djakadam and Sizing John cruised up ominously, but Coneygree rallied valiantly to set up a grandstand finish - despite having made a mistake at the second-last.
There was little to choose between the three jumping the final fence, but eventual runner-up Djakadam and Sizing John asserted soon after and it was the latter who won the battle by a short head.
Power said: "There was no hiding place out there. I was never that happy. I was off the bridle and he felt a bit flat, to tell you the truth.
"Fair play to the horse. He's only a seven-year-old and he had to dig deep. I was all out, but he's a very good horse."