Postpublished at 21:21 British Summer Time 14 July 2017
That's all from me tonight, keep an eye on the BBC Sport website for a full report from tonight's festivities.
Thank you for joining me.
Fourth and final stop on international media tour to promote fight
Events held in LA, Toronto, New York
Pair trade insults on stage at a sold-out Wembley Arena
Matt Davis
That's all from me tonight, keep an eye on the BBC Sport website for a full report from tonight's festivities.
Thank you for joining me.
Favourite insult of the night would have to be Mayweather's: "I'm a home cooked meal. you are a microwaved meal."
Biggest claim?
Mayweather wins it again with "I run Ireland."
Plenty of swearing from both parties but the whole thing was a bit playground wasn't it?
The most violent it got was when Mayweather ripped up a poster bearing McGregor's name.
I reckon that's it.
Few last words between the pair and then they exit the ring.
Not exactly explosive was it.
Let's hope the fight is better.
Next stop 26 August in Las Vegas.
"The whole trip has been amazing. Is it even a press conference? They transformed into something amazing," says McGregor.
Mayweather has finished.
So now they face-off.
McGregor's bearded face giving plenty of trashtalk.
Now it's question time.
This is nice, Mayweather asks everyone to wish McGregor a happy birthday.
Good of him that.
McGregor then asks everyone to chant something massively rude to the American.
Oh.
"You should have got me for the UFC, I run the octagon, I run the ring. You say something else I will beat you in the octagon" says Mayweather.
McGregor replies: "When I spark you on 26 August, I'm gonna make you face me in the rematch in the octagon and then we will see if you are all talk or not?"
Can't see Mayweather going for that.
McGregor flips the birdie at Mayweather, who tells him to shut up and throws a bottle of water on the floor.
This is genuinely what this has become.
"You're the student, I'm the teacher," says Mayweather.
"Well bring your schoolbag," replies McGregor.
Mayweather then asks Dana White if they can go to Dublin tomorrow.
Sounds a great plan lads, get me involved.
"I'm a home cooked meal. you are a microwaved meal," says Mayweather.
That is some metaphor, no idea what he is on about.
Mayweather makes the guy on the PA system play "tap out".
Guessing that refers to the time McGregor tapped out against Nate Diaz.
He keeps saying the Irishman is a quitter.
Apparently Mayweather was in Dublin the other week and didn't see McGregor.
Fair play to him, it's a big city.
Did people pay to go and watch this? They are not getting their money's worth.
Has Mayweather run out of things to say?
"I won't touch you to 26 August. he says, right in McGregor's face.
Mayweather asking for more chants then says something sweary to McGregor.
The American is recycling old material from earlier in the week.
"I run Ireland" says Mayweather.
He doesn't.
The crowd tell Mayweather to "sit down" and then launch into "Ohhhh Conor McGregor."
Clear favourite here.
Mayweather has taken all the microphones from McGregor's table, so the Irishman jumps up and gets one off the American's table.
"I'm too quick for you son, " says McGregor.
Mayweather launches into that "hard work" chant, the crowd booing him a fair bit.
Can Mayweather do any better?
He starts by ripping a Conor McGregor poster up and throwing it on the floor of the ring.
McGregor finishes by throwing the microphone on the floor.
Get the feeling he has run out of insults this week, that was tame.
"I am boxing" says McGregor.
He then gets all playground on Mayweather, rubbing his head and calling him a "slap head".
Classic primary school banter.