Roma have had three shots on target and guess what? They have three goals. The Serie A side were two goals down early on but have battled back to lead. Miralem Pjanic has got them in business and on course for a first win of the 2015-16 Champions League campaign.

Elsewhere Hulk is Zenit's super hero, they lead again, 2-1 against Lyon in Russia. That result would take them onto nine points and leave Lyon on one.

Chelsea's choreography is just a bit off isn't it? Eden Hazard starts a counter attack but every aspect of the move is 5% off. His pass is behind Cesc Fabregas, he then overcooks a touch and has to stretch to flick it wide to Diego Costa. Costa's touch is heavy and then his cross is poor. 

Image source, Reuters

A blow for club and country as Aaron Ramsey limps off. He is replaced by Alex Oxlade-Chamberlain.

Postpublished at 20:57

20:57

Arsenal 0-0 Bayern Munich

Aaron Ramsey has twanged his hamstring. He's coming off.

Image source, Opta

Bayern Munich have started this half like they did the first. How long can Arsenal keep the visitors out, with barely 6% possession?

What a hit! Robert Lewandowski comes out of the penalty area to forage on the left wing, the ball comes back inside and then pops up for the Pole 18 yards out. The Machine hammers the shot first time, instinctive, and it's flying in until Petr Cech turns it over the top.

Kurt Zouma is built like a linebacker but he's done OK out at right-back so far, he gets out of position slightly but recovers well and has the pace to make the tackle. Cesc Fabregas then shoots low and hard and on target at the other end. 

Douglas Costa has been the man of the match so far. You wonder where Arjen Robben and Franck Ribery fit into this team when fit. maybe they don't? Costa skips away from company again and then flashes a shot just over the top from 20 yards!

John Hartson
BBC Radio 5 live at the Emirates Stadium

"Bellerin is struggling against Costa. Costa has been their biggest threat and Bellerin needs some help. Aaron Ramsey down that right hand side needs to come back a bit because Bayern are having too much joy down that side."

So close! Willian with a free-kick, 22 yards out, lifts it over the wall and against the underside of the bar! You can't get much closer than that!

Xabi Alonso tries a shot from halfway! Good effort too but it drifts just wide...

And back under way in Ukraine.

Can't argue with that logic...

Under way!

Arsenal don't finish many halves of football with just 26% of possession. Is 0-0 a good result tonight?

Barcelona are being held by Belarus side BATE Borisov, though the Spaniards are having the better of exchanges.

They have seen home keeper Sergey Chernik in inspired form as he thwarted Neymar and Luis Suarez early on before Sergio Busquets saw a prod trickle across the goal line to roll wide. 

Image source, Opta

Phil McNulty
BBC Sport chief football writer

Image source, Getty Images

"Goalless but a first half of the highest quality. Bayern may have dominated possession but Arsenal are right in this - and two faultless goalkeeping performances from Petr Cech and Manuel Neuer."