Dortmund roll the dice again, Marcel Shelmzer coming on for Nuri Sahin. They are back under way in Monaco.

Almost all she wrote. Juan Cuadrado finds space on the right on the Barca box, steadies himself, but drags the shot wide of the far post. That was the ticket to the semis, right there.

Image source, AFP

The first action of the second half, Neymar remembering that he's there to play football rather than fight. Are jinking, meandering run begins as a threat, but is eventually snuffed out.

Back under way. The battle to keep it 11 v 11 recommences...

Here they come. If Barca are going to turn water into wine for a second time, they had better turn the tap on.

Image source, EPA

Tad K: Would be great to see an Italian side winning UCL. For a change.

onsideview:  Could watch a game like this all day. Masterful defending, no fear, and playing Barca at arms length. 

It's been brilliant, hasn't it? I'm trying to remember a better 0-0 than the one currently taking place at the Nou Camp, while Monaco look like they could score every time they go forward.

Thomashollern: Great to see proper footbal for once. Juventus refuse to be bullied and Barca cant handle it. Just needs a goal now.

David Broome: Barca showing they are only a good side when they get their way and that when they don't they are very poor losers.

Ed Morris: Juventus showing Barcelona a defensive masterclass.

Barcelona have certainly got the feelers out. But they're not working yet.

The Catalans have popped nine shots towards the Juve goal, but only one (that Lionel Messi effort, shown by the green arrow) has been on target.

Seven have been wayward (illustrated by the red arrows), with another blocked by a black and white shirt.

Image source, Opta

Juve managed four shots in a controlled first-half display, with only that one chance for Gonzalo Higuain forcing Marc-Andre ter Stegen into a save.  

All over? Dortmund need three, without letting one in at the other end. The latter bit seems like the trickiest part.

Image source, AFP

Monaco are still potent on the break, like a spider hoping to entice something tasty into its web. The Dortmund defence, leaky in the first 20 minutes, has stemmed the flow, but isn't inspiring any great confidence. I'm still sticking with four or more goals.

Half-time in the Battle of Barcelona. The home side need three, but they got five in the second half against PSG. At the minute, though, cards are outnumbering goals.

Dortmund knock a little harder, a free-kick from Marco Reus over the wall but not really testing the keeper. The Germans have been the better side for the past five minutes or so. They need one before half-time.

I'm telling you now, someone is having an early bath. Neymar goes into the book after getting involved with Miralem Pjanic, whose aerial challenge with Lionel Messi resulted in the little master face-planting the floor from a great height. Neymar would be suspended in Barca get through and is surely on his final warning tonight.

Image source, Reuters

Someone is getting sent off in this game. Andres Iniesta slides in from a different post code to sweep the legs of Juan Cuadrado. No grounds for complaint.

Image source, Getty Images

Big, big chance for Gonzalo Higuain, sliding in but not quite making a clean contact from eight yards out. Not enough pudding to get past Marc-Andre ter Stegen. That was soon after Ivan Rakitic had one stuck on him by Alex Sandro at the other end. No foul, but Barca may well have had a point with that one.

Rashida: I admire the beautiful football Barcelona, not so much this desperate, surrounding-the-referee Barcelona

Image source, Reuters

Neymar was the catalyst behind Barcelona's dramatic comeback against Paris St-Germain - and the Brazilian has been in the thick of things so far tonight.

Almost half of Barca's attacks have come down the left flank which the 25-year-old forward is patrolling (as you can see in our graphic below), while he has also had more touches than any other home player (41).

Image source, Opta