Here we go. Bob Williams brings the men to the centre of the ring...

Barry Jones
Former world champion on BBC Radio 5 Live Sport Extra

I think those last two rounds were really important for Warrington and it might just have been enough for him.

Warrington definitely ended on top, but you could easily say Lopez was on top at the start and in the middle rounds.

The Mexican may have won it on rounds - but the Leeds man may have snatched it at the last with sheer force and remarkable will.

I don't know about you, but I've forgotten the football.

That was stellar boxing, magnificent sport.

Warrington swings and swings, Lopez just about escapes. We get the final bell.

Both men raise their arms, and then embrace.

What. A. FIGHT.

Final 30 seconds. Can Warrington finish this off?

Two massive blows from Warrington, a one two to Lopez's head!

Final 90 seconds...

Lopez warned for holding. He is holding on, desperate for the final bell.

The ref could have stopped the fight there, Lopez had his glove to his head, he was not in a fighting stance.

But we get round 12...

Barry Jones
Former world champion on BBC Radio 5 Live Sport Extra

What a round! That's what champions do when their back is to the wall, they come out and put in a round like that.

As soon as the bell rang he went out there and put it on Lopez.

Huge round for Warrington. Maybe he suspects he needs a knockout?

This is the longest fight Lopez has ever been involved in now, but he is still looking full of beans.

But Warrington lands a really good left hook! And then a couple more. The Mexican unsettled for the first time.

This is so hard to call. You could make a good case for either fighter winning this at present.

Shot to the body from Warrington, a big one. This is his best round. Then one to the head!

Lopez is wobbling! Complaining, but he has nowhere to hide.

Carl Froch
Former world super-middleweight champion on BBC Radio 5 Live Sport Extra

Little bit more success here from Lopez, Warrington is making it rough but not landing enough shots.

Both guys are looking a bit tired now. This fight has the distance written all over.

If the judges are seeing something that we are not then it could go to Lopez, but for me Warrington is winning this fight by being rough and busy.

That round suggested Warrington could win this if he steps up a couple of notches. The issue is whether Lopez will let him.

Left to the body from Lopez, left to the head from Warrington. Blow for blow.

Lopez lands another couple of jabs, they hurt Warrington. If the challenger gets in a few more, he could become champion.

We are approaching endgame. Warrington, of course, is still battling.

Barry Jones
Former world champion on BBC Radio 5 Live Sport Extra

If Lopez did get hit low then the referee didn't see it and he just took his word for it.

Warrington was far busier before and after the break, he landed some good clean shots.

Wow, Lopez came from that break firing hot, and Warrington responds.

The tempo goes up a notch, both men land blows. Warrington lands one on the side of the head, Lopez unhappy again but that looked fair.

Is that a second wind for Warrington? The crowd thinks so...

Image source, Mark Robinson

Better from Warrington, pushing Lopez back to the ropes. But he can't land any good shots.

Lopez is complaining again, this time for a low blow around the back. Referee Bob Williams gives him a time-out, to boos from the crowd.

Barry Jones
Former world champion on BBC Radio 5 Live Sport Extra

That was another round for Lopez, he's picking his shots well.

For me, Warrington is taking too long to let his hands go. He did have a bit of success in that round but he's slowing down.