Michael Pearlman
BBC Wales Sport in Cardiff

How impressive from Anahi Sanchez who looked absolutely down and out when she was knocked down in the second round.

This is a seminal night for women's boxing, but Sanchez is showing exactly why she was a champion and is working Taylor hard as we approach the championship round.

That first world title is in sight after a superb eighth round for Taylor, she's four minutes from glory.

Anthony Joshua has been chatting to the media on his way in to the Principality Stadium.

"I haven't competed here yet," he said. "I have kept up on social media and it's looking lively.

"Before I left I said a little prayer, no matter if the guy is an ant or King Kong, you have to take hims seriously and find a way to beat him."

Katie Taylor is on the rampage in the eighth.

A left catches the Argentine's shoulder before a right finds its way to the body.

The Argentine won't go away, but it's Taylor bouncing and brimming with energy. She closes the space and lands another right hand.

Sanchez is looking a little weary, but she'll make it to round nine.

Anahi Sanchez isn't impressed at a clash of heads with Katie Taylor.

The Argentine is looking to back her opponent up but she's yet to faze Taylor.

That was a big response. The Irish fighter rocks Sanchez with a snappy right-hander to the chin. Sanchez felt that.

And now the crowd are enjoying it.

A fight worthy of a huge crowd.

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Anahi Sanchez has taken some punishment, but she keeps coming back.

Katie Taylor knocked the Argentine down in the second, but Sanchez is sticking with her opponent.

It's Taylor on top though, another flurry of body shots that land with varying success.

Michael Pearlman
BBC Wales Sport in Cardiff

Tonight could and almost certainly will see a world record attendance for an indoor sporting event, but surely records have already tumbled when it comes to women's boxing?

There are approximately 40,000 fans currently in the Principality Stadium and they are roaring on Katie Taylor.

Women's boxing is riding a crest of a wave and it is fantastic to see.

Into the fifth of a possible 10 rounds, Katie Taylor is desperate for her first world title.

The black-clad Irish fighter flings a gold-tinted glove at Anahi Sanchez and the Argentine just tries to ride that blow.

Sanchez throws a wild right arm of her own, but now Taylor has her in the corner and is looking to pick her shots - that's a wonderful right hand that catches Sanchez's chin late on.

There's no let up in the fourth.

Katie Taylor targets the body, but Anahi Sanchez is still standing strong.

The Argentine is flying into punches as quickly as Taylor can throw them back at her.

She's making the Irishwoman work for this.

Former world champ Paulie is feeling the energy, excitement is building for the main event...

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That's a good exchange between the fighters, it's turning into a bit of a scrap as Anahi Sanchez catches Katie Taylor.

Ooof. What a response from the Irish fighter, that right hand looked to have knocked Sanchez off her feet - somehow she regained composure, those legs looked like they had gone.

Sanchez comes back at her opponent. This is a proper bout.

Image source, PA

Colin Farrell is the most high profile Katie Taylor fan currently in the Principality Stadium, but Ireland's Olympic hero is getting a superb backing from an increasingly full Principality Stadium.

The roar of the night was certainly for her second round knockdown.

Image source, Rex Features

That's an eight-count, but the Argentine makes it up.

Katie Taylor flies forward and flings shot after shot into the body of Anahi Sanchez, she's trying to finish this quickly but Sanchez makes the bell.

Quick-fire, two-minute rounds for the WBA lightweight world title fight.

Katie Taylor, all in black with a gold trim, comes out quickest after the bell again and Anahi Sanchez walks on to a huge body shot from the Irish fighter...

Image source, Reuters

Katie Taylor is not hanging about. She goes straight on the attack with a flurry of left and rights.

The Irish fighter has to be on her toes to beat away an Anahi Sanchez response, before gunning for the Argentine once again.

Quick hands, plenty of power - aggressive from Taylor.

Here we go then.

Is this Katie Taylor's time?

Image source, Rex Features

Mike Costello
BBC Radio 5 live boxing commentator in Cardiff

I'm disappointed that the champion failed to make the weight because she was given time to lose a pound.

And that seemed to be well within her scope. But it doesn't change the challenge facing Katie Taylor.

She has to concentrate on her own performance. I was taking to her manager Brian Peters in the build-up and he agreed this has come early for her. But there is the issue of her going stale if she doesn't increase the momentum of the challenges with each passing fight.

He feels the time is right now to start moving into contention for showdowns with other champions and maybe other divisions.

Here comes Katie Taylor, with "a man's world" reverberating around the Principality Stadium...

The Irish fighter looks completely focused.

Image source, Reuters

Former Olympic champion Katie Taylor has won all six of her professional contests.

But the 31-year-old faces an experienced fighter in Anahi Sanchez, who boasts a record of 17 wins and two defeats from 19 bouts.

"This is the biggest night of my career. I'm so excited about it," said Taylor.

"These are the sort of fights that are going to elevate women's boxing. It's definitely a big step up.

"I've had a great 10-11 week training camp in America. These are the sort of challenges I relish and I can't wait for it."