Enzo Maccarinelli retained his WBO cruiserweight title with a spectacular first-round knockout over Mark Hobson at Manchester's MEN Arena.
Maccarinelli made short work of Hobson
The Swansea fighter caught his opponent cold with a big overhand right after only one minute and 11 seconds.
Hobson bravely got to his feet but what was expected to be a close contest was almost immediately waved off.
Maccarinelli had edged a thrilling contest in March when Hobson stepped in for the injured Johnny Nelson.
Maccarinelli said: "I went into the ring having so much respect for Mark and I've still got it.
"I knew I had to improve and couldn't come in like I did in March, so I didn't come out swinging like last time.
WALES' WORLD CHAMPIONS
Percy Jones (World flyweight champion, 1914)
Freddie Welsh (World lightweight champion, 1914-17)
Jimmy Wilde (World flyweight champion, 1916-23)
Howard Winstone (WBC featherweight champion, 1968)
Steve Robinson (WBO featherweight champion, 1993-95)
Robbie Regan (IBF flyweight champion, 1995, WBO bantamweight champion, 1996)
Barry Jones (WBO super featherweight champion, 1997)
Joe Calzaghe (WBO super middleweight champion, 1997-, IBF super middleweight champion 2006-)
Enzo Maccarinelli (WBO cruiserweight champion, 2006-)
"The Marcelo Dominguez fight [Maccarinelli knocked out the Argentine in July] taught me a lot. He was the first world-class fighter I had been in with.
"So I knew I had to change how I prepared this time and didn't cut any corners."
Hobson admitted he had been caught by a deceptively powerful punch.
"It didn't seem that hard a shot - in the first fight he seemed to hit me 10 times harder," he said.
"But when I tried to stand up I was wobbling about like a blancmange. I just got caught cold, as simple as that."
Maccarinelli's display was not the only eye-catching performance in Manchester on Saturday.
Fighting further down the card, Liverpool's Derry Matthews produced a sizzling performance to dethrone Salford featherweight Steve Foster and claim the WBU title.
The unbeaten 24-year-old completely outboxed his more experienced rival to earn landslide 118-108, 118-110, 119-107 verdicts on the three judges' scorecards to announce his big-time arrival in style.
"I am delighted because I completely outboxed a good fighter and the only way is up for me now," said Matthews.
"My dream is to defend my title back in Liverpool like all the great fighters from my city have done, and I hope my promoter Frank Warren can make big things happen for me."