Earlier on tonight...

Rio Olympic bronze medallist Joshua Buatsi gained the seventh win of his professional career with a first-round knockout of Latvia's Andrejs Pokumeiko.

Buatsi, 25, caught Pokumeiko with a huge left hook and the Latvian could not beat the count.

"It was less than a round, so hardly anything I can take - there is a lot more I have to work on," said Buatsi.

His promoter Eddie Hearn was not as shy. "You are watching the best prospect in world boxing," said Hearn. "He is not far off a world title already. Domestically he is ready to take on all these guys. In world level he is going to be special.

"This is a world class prospect, he will be headlining at the O2 some time soon."

Image source, PA

Dereck Chisora's career needs a big night. He has lost eight times, although some of those have been controversial and often very tight decisions.

He has lost three of the past six, against Agit Kabayel, Dillian Whyte and Kubrat Pulev.

He won't get many more chances to get himself back to world title contention.

Image source, Getty Images

Carlos Takam? Remember the name? He gave an absolute warrior-like performance against Anthony Joshua last October after taking the fight at only 10 days notice.

Joshua hit Takam with so many shots, and Takam kept coming forward, kept on throwing before it was stopped in the 10th, many people saying unfairly.

The 37-year-old Frenchman has not fought since that Joshua loss, but a win here also keeps him in the hunt for another shot at Joshua or Deontay Wilder.

Takam has won 35 of 40 fights, losing four and drawing one. Three of those losses have come against Parker, Alexander Povetkin and Joshua.

Dereck Chisora has not always been the most chilled out character in boxing. Remember his scuffle with David Haye at a press conference, or the time he threw a table at Dillian Whyte or the time he spat in the face of Wladimir Klitschko?

Well, here he is chilled out. For now at least.

Robert Williams: My favourite has to be Lennox Lewis beat every man he ever faced at a time when the heavyweight division was rich with talent.

Paul B: Why would it be anyone other than Muhammad Ali? I mean, seriously, why?

Ireland's John Joe Nevin, who won a silver medal at bantamweight in the 2012 Olympics, is hugely impressed with Taylor's performance.

We already know Katie Taylor's next opponent as she will be fighting Cindy Serrano in Chicago on 6 October.

Serrano, 36, hails from Puerto Rico and has a lot of experience, winning 27 of her 35 professional fights so may be more of a challenge than Connor provided today.

Image source, Reuters

Katie Taylor tells Sky Sports: "It was good, Kimberly was very tough, I just happened to catch her with a good shot, stay composed and finished it. I knew I had a bump around my eye.

"It has always been the plan (to be undisputed champion). I have two belts and have two more to go. I was completely focused on this fight, I knew I had a job to do.

"I'm definitely improving all the time, even with the finish, I stayed composed, I feel in the best shape and best form and am getting better all the time."

A flurry of punches from Taylor, Connor wobbles and has had to take some punishment in the third.

Another sustained attack from Taylor, another left stuns the American, who momentarily drops her guard.

She is a wide open target and Taylor unleashes a powerful, fast and accurate right and the referee Steve Gray jumps in. Taylor wins. Another hugely impressive performance.

Image source, Getty Images

Connor, without much success in the opening round, has caused some swelling under the right eye of Taylor. It may have been a head clash, but one to monitor.

Image source, Getty Images

Matt Holland Fitness: Without a doubt Mike Tyson. He brought an excitement and ferocity into the heavyweights that had never been seen before then.

Al Mc: AJ. Sport is always full of nostalgia and too many fans focus on the past while great is right in front of them.

Two lovely punches in the opening 20 seconds show Katie Taylor has immediately found her range. What an impact she has had in women's boxing since winning Olympic gold in London six years ago.

Connor takes a lot of shots in the opening round, with Taylor already looking fast, sharp and in the mood tonight.

Image source, Reuters

This is her 10th professional fight, but Katie Taylor has already fought in some fantastic venues, including Wembley Arena, Manchester Arena, Wembley Stadium and the Principality Stadium and two fights in New York.

She has fought at the O2 in London once before, win her third professional fight when she gained a fifth-round stoppage victory over Italy's Monica Gentili.

Fights: Taylor 9, Connor 18

Wins: Taylor 9, Connor 13

Knockouts: Taylor 4, Connor 5

Draws: Taylor 0, Connor 2

Losses: Taylor 0, Connor 3

This is a 10-round fight, consisting of two-minute rounds, with the IBF and WBA world titles on the line. This is Taylor's third defence of her WBA belt and first of her IBF strap.

Image source, ©INPHO/Matt Heasley

Next up at the O2 Arena is Ireland's Katie Taylor and the unified WBA and IBF lightweight world champion says she is in the best shape of her life.

The Olympic gold medallist faces mandatory challenger Kimberly Connor, with unbeaten Taylor seeking her 10th professional win.

"I know that Connor is going to bring her best but that in effect will bring the best out of me," said Taylor.

The Bray native landed her first world title in Cardiff last October, less than a year after her first professional fight.

American opponent Connor has a record of 13 wins and three losses.

"This is the boxer's dream. I am the absolute underdog in this situation and I want to be able to overcome and take the belts," she said.

A big night in the heavyweight division, and a simple topic for you.

We want to know...who is your favourite heavyweight of all time and why?

Tweet us via #bbcboxing and we will post your thoughts in this page throughout the evening.

The main event is expected to get going at about 22:30. Judging by the weigh-in, it is going to be feisty.

Watch as Dillian Whyte weighs in more than a stone heavier than Joseph Parker before the pair go nose-to-nose.

Whyte weighed in at 18st 6lb 90z with Parker a bit lighter at 17st 4lbs 8oz.

Hello. I'm Michael Emons and will be guiding you through a busy night of boxing. We are focusing on the big guns tonight with the main event seeing Dillian Whyte taking on Joseph Parker in a cracking heavyweight clash.

We also have Dereck Chisora in action against another former Joshua opponent, Carlos Takam.

And there's more. We will also be focusing on Ireland's Katie Taylor, who puts her WBA and IBF world lightweight titles on the line against tough American Kimberly Connor.