At the Sands Casino Resort, Berridge and his camp put his two championship belts on the line against a man 14cm taller and with an undefeated record. Lepikhin has never fought out of Russia, but that merely increased the mystery. He appears to have a big future.
The crowd cheered at hearing Berridge's "Butcher" nickname and very good record of 20 knockouts in his 24 victories, but he rarely took Lepikhin out of his comfort zone.
The defeat effectively takes him out of the running for a title fight against light heavyweight Sergei Kovalev.
Berridge, also knocked down in the second round, received a barrage of shots to the head and body throughout. One statistical measure had him throwing 233 punches to Lepikhin's 210, but connecting with only 39 compared with his opponent's 78.
He connected with only two jabs; Lepikhin put 20 past his defences. Afterwards he insisted he was fine physically and ready to continue as early as October 16 on the undercard of Parker's fight against Sherman Williams in Auckland.
"I wasn't aggressive enough, just no fire. I wasn't on form tonight," he said.
Berridge insisted he wasn't concerned about going behind early. "That doesn't worry me. I knew I had the power to knock him out. I caught him a couple of times. I just couldn't find that range all the time."
Trainer Cleve Langdon said: "He [Lepikhin] got his range early, it's as simple as that, and that meant he could drop his power shots on Robbie early on. As soon as you start dropping bombs on people ... you know I think Mike Tyson said it brilliantly ... 'everyone's got a game plan until they get punched in the face', and that was proven tonight."
Parker wasn't entirely happy with his third-round knockout of American Thompson.
"I felt flat in the warm-up and the fight. I don't want to make excuses, but it must have been the delay of coming over here," he said.
An American voice from the crowd urged on "Smokin' Joe" and Parker delivered, a powerful left uppercut knocking Thompson down and a flurry of punches seconds later resulted in a referee David Franciosi stopping it 2m 41s in. Parker impressed many ringside with his speed, power and, in particular, patience, a rare quality for a 22-year-old.
Parker, undefeated in 10 professional fights, and his promoters Duco Events, will now travel to New York and Los Angeles for talks with other promoters, while Berridge will travel straight home — disappointed but determined to fight on.
• Patrick McKendry of APNZ travelled to the United States with assistance from Duco Events
