Paul Gallen has taken his professional boxing record to 7-0 with an impressive knockout win over Ryan Carr-Ketu at Sydney's Southern Cross Group Stadium.

Ryan Carr-Ketu has kicked the hornet's nest ahead of his boxing bout with Paul Gallen, invoking the Cronulla peptide scandal.

Former world champion Bernard Hopkins' long and illustrious career ended in a brutal defeat when the 51-year-old light heavyweight was knocked out of the ring in the eighth round of his final fight in Los Angeles on Saturday.

Fledging boxing professional Tim Tszyu did a good job on his debut, but still has plenty to learn and will get further tuition in Russia, according to his famous father Kostya.

"There's a pattern here," he whispered as if revealing a secret. "The pattern is the DNA of who you are." Bernard Hopkins went on like this for more than an hour, sharing thoughts he formed over a Hall of Fame boxing career that has covered nearly three decades. Some of his lines were insightful, some humorous and some incomprehensible.

Brock Lesnar has been banned from the UFC for a year and had his victory over Sydney-based Mark Hunt overturned for doping.

Britain's Anthony Joshua set up an April showdown with veteran heavyweight Wladimir Klitschko on Saturday after retaining his IBF world title with a clinical third-round stoppage of outclassed American Eric Molina in Manchester.

Jeff Horn's trainer says he already has the blueprint to beat Manny Pacquiao should a blockbuster fight with the Filipino legend eventuate next year.

Australia's brightest boxing talent Jeff Horn has taken a huge step towards a dream date with Manny Pacquiao after a crushing win over South African veteran Ali Funeka on Saturday night in Auckland.

Junior Paulo wants another crack at Paul Gallen.

Paul Gallen, midway through the second round, looked gone.

Moments after Junior Paulo took off his shirt, revealing a rippling frame almost 20kg heavier than his own, Paul Gallen spoke with a bravado befitting his second occupation.

Legendary Australian trainer Johnny Lewis to be inducted into the world boxing Hall of Fame next year.

UFC living legend Conor McGregor has reportedly been issued a professional boxing license in the state of California.

Filipino boxing great Manny Pacquiao has left the door open on the possibility of a rematch with Floyd Mayweather if the American ever comes out of retirement.

Australian middleweight Robert Whittaker says he'll look to land an early knockout in Sunday's UFC bout with Derek Brunson in Melbourne.

Todd Carney is likely to face a much tougher challenge resuming his NRL career than in his boxing debut, with the governing body refusing to guarantee he will be re-registered.

Unbeaten Canberra boxer David Toussaint has scored a technical knockout victory over Junior Talipeau.

Canberra boxer David Toussaint was working up to 10 hours a day and trying to fit training in around it.