So what have you got Reading? You may as well throw everything at this now and Jamie Mackie does, shooting over from 25 yards.

Former England midfielder Danny Murphy
BBC One

"Adam Federici has played well, made some excellent saves, but that's a howler. I genuinely feel sorry for the lad. It took a slight deflection, but it is still no excuse."

Former Arsenal striker Ian Wright
Match of the Day at Wembley

"The goalkeeper will never forget something like that. But I don't feel like the game is over."

Moments ago Adam Federici made a hash of an Aaron Ramsey shot but got out of jail, this time he is punished and it's tough to watch. Cruel, brutal, horrible.

Alexis Sanchez cuts in from the left flank, he wants shooting space in the area but when it arrives the effort is tame. An easy pick up? Nope. It squirms through his body, trickles over the line and Federici sinks to the turf.

Magical cross-field pass by Santi Cazorla finds Kieran Gibbs who crosses, well cleared. Pavel Pogrebnyak will compete for that punt and does well, he races into the area but his effort is blocked.

Adam Federici's heart just leapt into his mouth and dropped back down again. He makes a meal of Aaron Ramsey's strike from 30 yards and parries the low drive over his bar. That ball could have gone anywhere.

Mesut Ozil with a beautifully disguised pass to find Alexis Sanchez but Nathaniel Chalobah springs to rattle the Chilean's cage. He gobbled that ball up, great defending.

And after much build-up, Francis Coquelin departs for Theo Walcott. That's a deep midfielder sacrificed which will probably see Santi Cazorla drop back a touch.

Karl Simmonds: Reading superb, Arsenal below par. But where is Theo Walcott?

Arsenal Crew: Extra time is screaming for Walcott with his pace.

David Kent: My nerves will not last another 30 minutes.

Get involved on Twitter using #bbcfacup, external or post a comment on the BBC Sport Facebook page., external

You can also text us in the UK only on 81111 - but please don't forget to include your name and location.

Former England midfielder Danny Murphy
BBC One

"I'm still baffled by the fact we have not seen Theo Walcott for Arsenal."

We will in a moment.

Feed the Yak? Yakubu is on the bench for Reading, chewing away. He sniffs goals and looks a great option. Reading are so well organised. A back four, three bodies in front of it, then another two, then Pogrebnyak. Again it does the job as Arsenal are forced to go long and Olivier Giroud is offside.

Reading again get bodies behind the ball as Arsenal build slowly. The architects - Mesut Ozil and Santi Cazorla - are deep, that will please the Championship side and they pounce to win the ball back through Jem Karacan.

Former England winger Chris Waddle
Match of the Day live at Wembley

"This period is a little bit like the beginning of the game again. Reading look tired and are letting Arsenal dominate the ball. Steve Clarke's side have to lift the tempo."

LaurenLola: Arsenal have definitely underestimated reading! Premier League Player of the Month doesn't join the pitch till 70 minutes in. Why?!

Olivier Giroud has already had two shots since his introduction.

Get involved on Twitter using #bbcfacup, external or post a comment on the BBC Sport Facebook page., external

You can also text us in the UK only on 81111 - but please don't forget to include your name and location.

Former Reading chairman John Madejski is sat with a blue scarf on and a worried look on his face. He is engaged in conversation with FA chairman Greg Dyke. Hopefully that's not the cause of the worry, it's probably the antics of his beloved team.

Mesut Ozil with a delicate flick on to Olivier Giroud as Arsenal inject some pace into an attack but it's not under the Frenchman's spell and Reading's narrow back line clear. The diligence and awareness of Reading's defenders has been superb all day. They see danger coming like a missile detector.

Former Arsenal striker Ian Wright
Match of the Day at Wembley

"We have waited 90 minutes for Arsenal to get going. Arsenal should be beating Reading, but Reading should take a lot of credit. Arsenal will have to do more to win this."

And so we go again. Reading attack the Arsenal end. They have two substitutions to make, Arsenal just one. Who has more in the tank?

Former England striker Alan Shearer, Match of the Day at Wembley
BBC Sport

"Reading have been magnificent, they have given everything to the cause and deserve the score line. They have worked their socks off, created chances, defended well and deserve to be where they are. They had one hell of an opportunity now I hope they don't regret it.

"I get the impression they thought all they had to do was turn up to win the game, They have been leggy and sloppy other than one or two pieces of brilliance. Other than that they have not offered a lot, their passing has been slow and they have been punished."

606 phone-in
BBC Radio 5 live

The lines are open for 606 with Kelly Cates and Kevin Kilbane.

They want your reaction to the outcome of the FA Cup semi-final between Arsenal and Reading.

Leicester are of the off the bottom of the Premier League for the first time since November - can they pull off a great escape?

If Chelsea go on to beat Manchester United - is that the title completely over?

We also want to hear from fans of Bristol City, who were confirmed champions of League One and Burton Albion - who were promoted from League Two today.

Call: 0500 909 693

Text: 850 58

We're BBC 606 on Social media., external