Image source, Reuters

On 10 minutes the 10,000 Middlesbrough fans hold up their mobile phones in a light show, it's a staged demonstration in support of steel workers in the north east. Plenty of Manchester United fans join in.

Ashley Wilkinson: I'm going to enjoy the customary "Jurgen Klopp celebration" replays after every #LFC, external goal. How can you not like the man

David McNaught: Top goal, that. Incisive, creative, a bit audacious. Now Klopp, hook Allen.

What sort of response can Bournemouth muster? A very good one actually. Junior Stanislas almost equalises for the visitors, his close-range header forcing Reds keeper Adam Bogdan into a smart save.

Image source, Reuters

Pablo Zabaleta and Yannick Bolasie bump heads and there's a bit of treatment needed - looks like they'll both be OK though. Bandages all round.

Adam Williams
BBC Sport at St Mary's

Still goalless here, but no shortage of endeavour from Aston Villa who are working hard to keep Southampton at bay.

The travelling contingent of supporters are also giving them plenty of encouragement.

Chris Bevan
BBC Sport at Etihad Stadium

Shades of Sevilla last week here at the Etihad - Palace are looking dangerous down the wings and City are living a little dangerously when the ball comes into the middle. It was Jesus Navas who put off Yannick Bolasie with Palace's last chance - this time it is Eliaquim Mangala who throws himself at the ball to block Jordon Mutch's cross at the near post.

Where are Liverpool's goals going to come from? It's hard to say after the opening 15 minutes. Divock Origi has barely had a kick, although Roberto Firmino - who had that first-minute shot - is buzzing about. And then...

...the Brazilian is picked out by Jordan Ibe after peeling off to the 'D' of the away penalty box, fizzing a thunderous shot which needs to be tipped over by Cherries keeper Adam Federici.

Danny Mills
BBC Radio 5 live at Old Trafford

It is an opportunity for Middlesbrough to win tonight. Imagine they win and the confidence that it would bring. Get a decent draw in the next round and they're in the semi-finals - one game away from Wembley.

Image source, Reuters

We are under way at Old Trafford...

Chance for Palace as a cross from Wilfried Zaha works its way through to Yannick Bolasie at the back post, he hesitates and cuts back inside and eventually Willy Caballero makes a good save, standing up well.

Absolute Zero: None of starting 11 have scored this season and only 2 of them have ever scored for Liverpool - that says it all

Fernando finds striker Kelechi Iheanacho on the edge of the box and the City youngster hammers a drive over the bar from 18 yards out. Bright start. 

Open game at Anfield. Bournemouth manager Eddie Howe pledged his side would make a fast start - and that's what they have done. The Cherries force the game's first corner after a quick break down the right through Matt Ritchie. However, the set-piece is headed wide by Simon Francis.

Adam Williams
BBC Sport at St Mary's

Image source, PA

Plenty of noise inside St Mary's if not plenty of clear-cut chances in the opening 10 minutes.

Villa have started brightly though with both Rudy Gestede and Leandro Bacuna heading half chances towards goal.

There are nearly 10,000 Middlesbrough fans inside Old Trafford tonight and they are making a superb din as we close in on kick-off.

Aitor Karanka is a popular man...

Oh, Bournemouth should be ahead! Joe Allen dilly-dallies inside his own half, gets dispossessed and the Cherries charge forward. Junior Stanislas makes a mug of Dejan Lovren - that's £20m defender Dejan Lovren - who commits early as the Bournemouth man skips inside him. Luckily for the Reds, Stanislas is denied by the legs of the alert Adam Bogdan.

Chris Bevan
BBC Sport

Image source, Reuters

"Wilfried Bony was asking why he did not get a cross from that Kevin de Bruyne chance, but I had the perfect angle to see that he was blocked off by the position of a Palace defender at Wayne Hennessey's near post.

"If De Bruyne had tried to pass, rather than shoot, the ball would not have reached him on the edge of the six-yard box."

An early chance for City as Kevin de Bruyne beats Scott Dann but fires wide from a tight angle.