David Haye was on top from the opening bell in London on Saturday night
David Haye returned after a three-and-half-year lay-off with a first-round knockout of Mark de Mori in London.
Australian De Mori looked bothered by the first jab Haye threw and thereafter it was one-way traffic.
Haye, 35, set up the finish with huge overhand right and De Mori was unconscious before he hit the canvas with 49 seconds left in the round.
Haye's stated ambition is to regain the world heavyweight crown he lost to Wladimir Klitschko in 2011.
The Londoner's last fight was a fifth-round knockout of Dereck Chisora in July 2012 and prior to Saturday he had fought only four times in five years.
He announced his retirement in 2013, having been advised not to fight again after undergoing extensive shoulder surgery.
Judging by the 16,000 crowd at the O2 Arena, Haye's comeback certainly piqued the interest of the British public, although some of them might have felt short-changed by the fare on offer.
Before Saturday, the 33-year-old De Mori had been beaten only once in 33 professional fights but he was hopelessly outgunned by his more celebrated opponent.
One thing we did learn from the fight was that Haye's shoulder reconstruction has done nothing to quell his power, while his successful return creates further intrigue in a revitalised heavyweight division.
Klitschko lost his WBA, IBF and WBO belts to Manchester's Tyson Fury last November, although Fury has since been stripped by the IBF.
Fury has vowed he will never defend his titles against Haye, who now has 27 wins from 29 fights, after the Londoner pulled out of two scheduled bouts against him in 2013.
But if Fury defeats Klitschko in a rematch this summer and Haye puts a string of eye-catching victories together, money might begin to talk louder than words.
Later on Saturday, WBC champion Deontay Wilder defends his title against Poland's Artur Szpilka, while on the same card in New York Charles Martin fights Vyacheslav Glazkov for the vacant IBF title.
Another potential future opponent for Haye is fellow Londoner Anthony Joshua, although Joshua's team are unlikely to risk their man against a man of Haye's pedigree any time soon.