Postpublished at 05:39 Greenwich Mean Time 10 November 2019
Right, let's find out the result.
YouTubers KSI and Logan Paul square up in professional fight at Staples Center in Los Angeles
First fight at Manchester Arena last August ended in a draw
Undercard: WBO super-middleweight world champion Billy Joe Saunders stops Argentine Marcelo Esteban Cocere
American Devin Haney defeats Dominican Republic's Alfredo Santiago
Get involved: #bbcboxing
Marc Higginson
Right, let's find out the result.
KSI was a clear winner before the knockdown. I'd love to see how many shots he threw - I bet it was three or four times more than Paul. But how many landed?
Chunkz
Youtuber ringside for BBC Sounds
KSI definitely won! No doubt in my mind he's the winner.
Steve Bunce
BBC Radio 5 Live boxing pundit
They did not not touch gloves at the end - let's make that clear!
Round 6
Steve Bunce
BBC Radio 5 Live boxing pundit
They both look exhausted but it was a good combination at the end from KSI.
Sensational entertainment, that.
I've got this down as a draw, you know.
Anyone fancy a third fight?
It's all over.
Over to the judges and their scorecards.
A yellow hoodied Justin Bieber clasps his hands and looks to the heavens.
Round 6
Steve Bunce
BBC Radio 5 Live boxing pundit
Same uppercut again from Logan Paul there. It's a good shot to use in this round.
The crowd are on their feet. One last shot for both men.
Punches are thrown like confetti.
Round 6
Steve Bunce
BBC Radio 5 Live boxing pundit
I always thought it would go six rounds and always thought it would be close. If you win this fight clean - I'm going to give you this fight.
A smart left jab pushes Logan back. KSI is doing the running in the final round. Sixty seconds left...
KSI chases Logan, almost throwing himself off his feet with those banging rights. They ain't landing though. It's just fresh air he's hurting.
Round 6
Steve Bunce
BBC Radio 5 Live boxing pundit
They are both tired and on weary legs. It's a tight fight but I've got it 3-2 for KSI.
The pair come out swinging in the final round. It's been frenetic from start to finish.
Thrill-a-second.
#bbcboxing
Supreme meme: Had it on in the background and it's a surprisingly entertaining fight.
Logan wins that one. We're going into the final round.
All to play for. This could go either way.
Round 5
Steve Bunce
BBC Radio 5 Live boxing pundit
These two are fighting on guts and memory. Look at the effort, look at the desire. The punches are scrappy but all Logan Paul has to do is stick the jab out with KSI looking unsteady.
Logan Paul is hunting down KSI. Hands down, looking for an opening. KSI has a good defence though. High hands - different styles.
Logan Paul has a look of Ivan Drago with his tall, muscular figure and blond hair.
He is the aggressor now. KSI is hurt after that knockdown.
The wind has been taken from his sails.