As soon as I say that, Algeria have a decent opening through main man Islam Slimani. He is allowed to run at the heart of the German defence and fires a shot right at Manuel Neuer! Moments later they get in again but the cross is no good.

We could be in for a blockbuster 15 minutes...

Under 20 minutes to go. Algeria just starting to look leggy in attack and remember, Nigeria held France to 0-0 until the last 10 minutes.

Former England winger Chris Waddle
BBC Radio 5 live in Porto Alegre

"Neuer is brilliant as a sweeper. He reads the game so well, he is always on edge of the 'd' and ready to come out to pick up long balls."

Brilliant again from Manuel Neuer, coming off his line to head the ball clear, 20 yards out of his goal. It looks so risky, but he genuinely knows what he's doing...

Image source, Getty Images

That could be end of Shkodran Mustafi's World Cup I would have thought, as he leaves the field on a stretcher. Germany's World Cup could be over tonight yet - although they will fancy it if it goes to penalties.

As you wish Didi...

Former Germany midfielder Dietmar Hamann:, external "Lahm's positional sense is very poor in midfield. We got two centre-halves playing full-back. Move Lahm back to full-back and bring Khedira on."

Another change to the Germany back four coming up as Shkodran Mustafi has pinged a hamstring. They will replace him with Sami Khedira, which will see Philipp Lahm move back to full-back. All change.

Simon, Canterbury: Great goalkeeping from Rais Mbolhi. Albert Camus would be proud.

Time for a change Jogi Low? Miroslav Klose is still sitting in the dugout. His side's tempo has just dipped again after a manic 15 minutes at the start of the half.

Image source, AP

As searches for vengeance go, this has been up there with Kill Bill. Brilliant game so far.

Former England winger Chris Waddle
BBC Radio 5 live in Porto Alegre

"Schurrle has held the width well since he has come on and used his pace - because he's got plenty of it. But his final ball has let him down.

"It is all Germany in the second half. Algeria have come off the pace and tried to slow down the game. Germany are getting more space higher up the field which they didn't have before."

Tom Edwards:, external Anyone else think this is set up for Miroslav Klose to come on and score? Ultimate poacher who Germany could use right about now.

Pete Hamilton:, external Klose to come on, score, win the match and break the record?

BBC Sport's David Ornstein at Estadio Beira-Rio

"'Ole!' chant the pockets of Algeria fans as their team enjoy a lengthy period of possession and continue to hold their own, bringing sustained whistling from the German masses.

"At last the crowd have been given something to cheer about: the first Mexican Wave of the evening. It's actually pretty impressive."

Into the last half an hour, Andre Schurrle makes the worst decision since I bought a pasty from a service station at 3am last night and fires well over the top from out on the right. Awful shot, and he gets a glare from Thomas Muller which leaves him in no doubts...

Former England winger Chris Waddle
BBC Radio 5 live in Porto Alegre

"Thomas Muller has not had many decent chances. There is not a lot of room up there for him and he's had no decent service. Germany have been very disappointing."

Philipp Lahm has got five goals for Germany in over 100 caps but that would have been one to remember. He did score in the 2006 World Cup, and at the Euros last time out. Big game player.

Germany have been excellent since the break. This is made for a Miroslav Klose tap-in isn't it?

Marwan:, external A completely different start from the Germans. However this continuous attacking play might have led to an Algeria goal.

John McEnerney:, external What a pass from Manuel Neuer for that attack! Like a quarterback except it was with a boot!

Wilders:, external Neuer's the only decent Germany player on the pitch!

Great noise inside Estadio Beira-Rio now as one of the best 0-0s I've seen in years continues at a frantic pace. Both teams slugging away looking away for a knockout, as if they know they can't go the distance. And there it is - almost!

Wonderful pass from Toni Kroos into Thomas Muller in the D, he lays it back to Philipp Lahm and he arcs a fine strike into the top corner - but Rais Mbolhi makes a wonderful flying save! Right off the end of one finger.

Lahm can't believe it.