Patrick Bamford is one of Chelsea's legion of loanees away from Stamford Bridge. Where will he be playing next season? He's proven himself in the Championship - is he due a run in the top flight?

Former Scotland international Pat Nevin
At The Emirates for BBC Radio 5 live

"Definitely Boro have changed. Patrick Bamford was almost playing as a right midfielder before but he has moved right up alongside Kike. He is a central attacking player so he will be happy there."

Danny Welbeck tackles himself! A fine skill, and he wins a free-kick for it too.

Interestingly Arsenal met Middlesbrough in the FA Cup 115 years ago today. Arsenal won 2-0 then.

Saagar Kalelkar:, external It's like an overwhelming boxing match. Just got a punch in the face, before you realise what happened you get a knockout blow.

Mathew Penistone:, external Just as I was texting a friend to say how much Giroud was annoying me being lazy! BOOM.

Get in touch at #bbcfacup, external, pop on to the BBC Sport Facebook page, external or BBC Sport's Google+ area., external

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Is it three? Nearly! Alexis Sanchez is so fast, he gets to the ball forwards before Boro keeper Tomas Mejias, a touch sends it over the keeper but Adam Clayton does well to sweep up and hook it clear.

Arsenal are FA Cup holders of course, and they may fancy their chances of retaining the trophy. Most of the big boys have fallen by the wayside so far.

BBC Radio 5 live

Bradford goalscorer Jon Stead talking to BBC Radio 5 live on the Valley Parade pitch:

"It was a terrific start for us to get the goal and we carried on from there. We did the right things in the right areas. Every one of us has put a shift in and we had to to get the result today.

"I'm looking at that wall of the support we have and it's just amazing."

Former Scotland international Pat Nevin
At The Emirates for BBC Radio 5 live

Image source, EPA

"Until one minute ago you thought "Boro are starting to look comfortable" but that man Olivier Giroud, how many times has he scored at that near post?"

In the words of Ron Burgundy, that escalated quickly! Middlesbrough had looked comfortable but that's what the best sides can do to you. From comfort to contorted in the space of a few minutes.

Image source, AP

He's at it again! Olivier Giroud with another cracking first-time finish, meeting an Alexis Sanchez corner at the near post to crash in a left-footed volley. In the blink of an eye Arsenal turn it on and have Middlesbrough on the rack.

Image source, Getty Images

An absolutely brilliant goal! What a move, Barcelona or Bayern Munch would be delighted with this one. Alexis Sanchez starts it with a cross-field run, Danny Welbeck then tees it off for Santi Cazorla. He fools everyone with a raking cross-field ball back out wide to the left, on the blindside, and Kieran Gibbs is able to pick out Olivier Giroud with a sweeping cross and the Frenchman converts from close range.

Lovely stuff all round.

Kevin Kilbane
At Valley Parade for BBC Radio 5 live

"Sunderland's players couldn't compete with the tempo that Bradford started with. But they also had the quality to go with the tempo.

"To a man Bradford were so much better. You could have had 11 men of the match today and they scored two great goals.

"You have to give credit for the way Bradford have played but Sunderland have been miserable today.

"Gus Poyet's side have shown very little. Apart from the Steven Fletcher chance when he was offside, and maybe when they could have had a penalty, they have been poor."

Image source, Getty Images

So far, so good for Middlesbrough as they have yet to be seriously stretched by the Arsenal. Danny Welbeck looks to work a neat one-two with Olivier Giroud but the Frenchman's ball through is overcooked.

Gus Poyet shakes the hands of his players as they leave the field but he has looked very, very unhappy for the last 75 minutes or so. Expect fireworks in his post-match interviews.

Guy Mowbray
BBC Match of the Day commentator

"Before Bradford faced Chelsea it was 'What if?' This afternoon it was 'Why not?'

"Now, it's 'Who's next?'

Bradford are into the FA Cup quarter-finals! A superb win for the Bantams.

I don't think this can quite top beating Chelsea at Chelsea, but Bradford have been brilliant again today. Thoroughly, thoroughly deserved win for the League One side.

Daniel Branch:, external Suddenly it now doesn't look too bad when Bradford scraped past the mighty Halifax Town back in round one!

Cormac Murray:, external Jon Stead finally got his 100th club goal. A Blackburn saviour in 2004, glad to see him in form at Bradford after a turbulent career.

Richard Jackson:, external Its been coming for a while now. Poyet has no clue at all!

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'Ole!' football from Bradford now as they run down the clock. Jon Stead gets a standing ovation as he comes off. Can he continue his scoring run in the quarters?

Kevin Kilbane
At Valley Parade for BBC Radio 5 live

"I mentioned James Hanson playing as an inside-left earlier, but he is now playing as a left winger. So more of a 4-5-1 now. But that is understandable for Bradford, making it more difficult for Sunderland to break them down."