Nacho Monreal keeps Petr Cech on his toes with a tackle/backpass which thumps at the keeper at neck height, Cech does really well to chest it down and clear. Monreal's intervention was needed as Alvaro Morata had manhandled Shkodran Mustafi far too easily.

Jay Barnes: Lacazette has the composure of a goldfish. Or Roberto Soldado.

Chris Sutton
Ex-Chelsea striker on BBC Radio 5 live

It was an incredible miss. Aaron Ramsey made a brilliant run into the box but Lacazette must be four yards out from an open goal and he hits it over.

Image source, PA

How has that stayed out?!

Aaron Ramsey runs into the area, cuts past both Cesar Azpilicueta and David Luiz and improvises a scooped toe-poke which thumps against the post, before Alexandre Lacazette puts the rebound over the top!

He had an open goal. It came to him at an awkward height but he should surely score there!

Image source, Reuters

Yep, if you're just dialling in Danny Welbeck probably should have scored, Pedro definitely should have scored.

Chris Sutton
Ex-Chelsea striker on BBC Radio 5 live

I think Chelsea had the better opening but Arsenal have grown in belief as the first half has gone on.

It's the story of two missed chances though.

Image source, Getty Images

Alvaro Morata shows his aerial prowess again, at the other end this time to clear a dangerous Arsenal free-kick.

Victor Moses then misses his kick and Laurent Koscielny has a half sight of goal - but shanks his shot way over.

Jonathan Overend
BBC Radio 5 live at Old Trafford

It was always going to happen.

Manchester United emphasise how happy they are with their summer signing, trumpeting it from the front page of the programme.

The fact Romelu Lukaku's facing his former club? Purely coincidental of course.

It's a day of players facing old clubs and William Gallas - a stalwart for both of these two, and Tottenham - is in the stands.

The fact I'm telling you that tells you that the game has fallen into a bit of a lull after that flurry of half chances.

Phil McNulty
BBC Sport chief football writer at Stamford Bridge

Arsenal manager Arsene Wenger - jacket off as he stands on the touchline - has been holding regular dialogue with the officials near his technical area. Fair to say he has not been happy with quite a few decisions.

Wenger will be pretty satisfied with Arsenal's performances so far, though.

Image source, Reuters

Close! Granit Xhaka takes aim from about 25 yards and hits it really cleanly. That's got a lovely trajectory but ends up a few yards wide, bouncing away off the advertising boards.

Chelsea have got another striker - a good one too. We just don't know where he is do we?

Sho Rahman: Still early but Arsenal working much harder off the ball today than in previous big games. Better shape.

Dave Parker: Who said Chelsea don't have strength in depth? Looks like a pretty strong bench, although another striker wouldn't go amiss.

Image source, Reuters

Two shots on target each, and they should definitely have scored at least one each you'd feel. It's been a promising first quarter.

Chris Sutton
Ex-Chelsea striker on BBC Radio 5 live

Both sides have had big chances. Welbeck should have buried his header. He didn't make the keeper work.

Pedro got through one-on-one but had no conviction with his finish.

Good game this! Pedro is the latest to feel that he should have opened the scoring. Cesc Fabregas finds him with a beauty of a through ball, the Arsenal defence didn't seem to realise that Pedro was back on the field. He's clean through, Laurent Koscielny gets back to apply pressure but Pedro never looks convincing and his shot is tame. Really tame.

Image source, Reuters

This is a good spell for Arsenal as Sead Kolasinac rattles in a low shot, Thibaut Courtois can only parry it out and he's lucky that the ball goes in between two Arsenal attackers following up.

Did Arsenal need to take one of those chances?!

Pedro is back on.

Image source, Reuters

Postpublished at 19 mins

19 mins

Chelsea 0-0 Arsenal

Pedro is down and looks in real pain after a crunching tackle from Nacho Monreal. Eden Hazard is out to warm up.

KB: I somehow see Arsenal getting one in around the 60th minute, hanging on to finally draw at the 91st minute.

Dave W: Welbeck moves well but I reckon Giroud would have buried that header.

Brilliant from Hector Bellerin again as he sprints behind Marcos Alonso for the second time in a minute, his cutback reaches Alexandre Lacazette, but his low shot is straight at Thibaut Courtois.

Encouraging for the visitors.