Postpublished at 23:25 British Summer Time 27 May 2017
Round 10: Brook v Spence
Mike Costello
BBC boxing correspondent at Bramall Lane
How on earth is he finding the willpower and strength to even stand up. Let alone even throw punches.
Spence Jr stops Brook in 11th round
George Groves beats Fedor Chudinov to win the vacant WBA world super-middleweight title
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Michael Emons
Round 10: Brook v Spence
Mike Costello
BBC boxing correspondent at Bramall Lane
How on earth is he finding the willpower and strength to even stand up. Let alone even throw punches.
Round 10: Brook v Spence
Kell Brook was probably one punch from losing his world title in the tenth. The bell goes. How is this fight still going? No-one knows, but it is still going.
Round 10: Brook v Spence
Mike Costello
BBC boxing correspondent at Bramall Lane
There's still some fight left in Brook. Where is he dredging this up from?
Round 10: Brook v Spence
Brook musters every ounce of strength to stay in the fight.
Round 10: Brook v Spence
But Spence attacks again.
Round 10: Brook v Spence
Somehow Brook survives.
Round 10: Brook v Spence
Brook gets up, Howard Foster lets him continue.
But wait, this is going to be over soon. Brook in desperate trouble.
Round 9: Brook v Spence
Adam Booth
Former trainer of David Haye on BBC Radio 5 live
That was definitely the clearest round of the fight. Kell's eye is swelling up. The Briton shut down during that round.
Round 9: Brook v Spence
Some interesting mind games at the end of the ninth. Spence is shown grinning at his corner, while Brook raises his arm in defiance. He gets a cheer.
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Andrew Priestley - Brook looks like he might have hit the wall here. He's blowing a bit.
Round 9: Brook v Spence
It was pure survival mode for Kell Brook. Errol Spence dominated the three minutes of the ninth and Brook, somehow stays in the contest, despite getting tagged a lot in that round.
Round 9: Brook v Spence
Spence attacks, Brook in trouble.
Round 9: Brook v Spence
Round nine and Kell Brook has to get the tape around his gloves sorted out. It gives him a bit of a breather, but does highlight how much the left eye is swelling up.
The eye injury is getting worse for the Englishman.
Round 9: Brook v Spence
Lennox Lewis, the three-time world heavyweight champion, thinks Spence is edging back into it...
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Round 8: Brook v Spence
Adam Booth
Former trainer of David Haye on BBC Radio 5 live
They are both having equal amounts of success at the moment.
Round 8: Brook v Spence
Liam Smith has Brook ahead by one, and we could well be heading to the judges scorecards the way this is going.
Lefts to the head have been a successful outlet from Spence and they continue to be in the eighth.
To make things worse for Brook, there is some swelling around his left eye. He damaged his right eye in the loss to Gennady Golovkin, so at least it is not the same problem.
"You're in front" trainer Dominic Ingle tells Brook. He may well be, but not by much, if at all.
Round 8: Brook v Spence
Liam Smith, the former WBO light-middleweight champion, has Brook ahead...
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Round 7: Brook v Spence
Adam Booth
Former trainer of David Haye on BBC Radio 5 live
Another incredibly tight round. All of them bar one has been that way. Spence has not been here before from now on, Kell has.
Round 7: Brook v Spence
A left hook from Spence gives Brook something to think about. It is a bit ragged, a bit rough in the seventh as the energy tanks from both fighters are deteriorating.
Brook has had to drop down two weight divisions from his unsuccessful attempt against Gennady Golovkin, however, Brook took part in an intensive 12-week training camp in Fuerteventura to ensure his fitness was at the highest level possible.