Daniel Sturridge is up in the stands looking on. He had a loan spell at Bolton of course a few years back which kicked him on no end. How different might Liverpool's season have been had he stayed fit?

Jimmy Armfield
BBC Radio 5 live

"I thought Lallana was going to score but he took one turn to many. Then Johnson hit his shot well, but Bogdan held on to it."

Chelsea goalkeeper Petr Cech, speaking to BBC Sport: "I thought once we went 2-0 up we had a big advantage but it was a tricky one because we actually scored from almost nothing and they had had chances before. We knew it would be difficult and as soon as they scored the equaliser we lost control of what we wanted to do. Today they were much more enthusiastic about the game.

"It was a Black Saturday for the Premier League teams. Every year you can see this kind of result in the FA Cup. That is why I always say it is special. It is just unfortunate that today, for the first time, I was on the wrong side of this miracle. Credit to Bradford, they scored four great goals and deserved to go through."

The game is really opening up. After Dean Moxey's screamer, Liverpool dial up the pressure. Raheem Sterling keeps the ball, he's only 15 yards out but you can't get it off him. Eventually he stands it up, Javier Manquillo heads it down and Adam Lallana can't force it over the line from four yards out. It comes back out and Glen Johnson sees his left-footed hit saved by Adam Bogdan.

Jimmy Armfield
BBC Radio 5 live

"When it started off it was heading for the goal, but he hit it with the outstep of the left foot and just faded away."

What a hit! That was almost another FA Cup great moment for the day! Bolton so close as Dean Moxey runs on to a dropping ball, takes the cover off it with a crisp left-footed half volley from 20 yards which flies past Simon Mignolet but two yards wide of the post!

Raheem Sterling conjured a goal out of nothing in midweek and he is almost at it again. Bolton leave a real high line, almost on the halfway line, and one pass sends Sterling running in on goal. Matt Mills does exceptionally well to stick with him, show him inside and eventually make the block. Top defending.

Eidue Gudjohnsen takes a whack to the back and at the age of 36 it leaves him in a heap. Ouch. Get the magic spray out.

Leicester boss Nigel Pearson on the controversial first-half decision by referee Robert Madley to book Croatian striker Andrej Kramaric instead of awarding a penalty: "Those sorts of issues do need addressing. It is very easy for managers to forget about it, based on the result. But we certainly felt aggrieved that we didn't get a penalty - and on top of that Kramaric being booked was harsh. But it's another example of why don't we use technology - it wouldn't take long to clarify the situation.

"We kept going and we needed to. Tottenham are a squad full of athletes. They are also very good technically and as a unit physically they are pretty impressive, so for us it was a game in which we had to compete on lots of different levels. In the first half when they had lots of possession we had to show a lot of courage to stick in there."

Watch the highlights from the game right now on our FA Cup page.

Jimmy Armfield
BBC Radio 5 live

"Bolton have had a few corners, and they've varied them - driving them in low, or knocking one to the far side of the six yard box so they have obviously been working on them on the training pitch."

It has been a weekend of upsets and giant-killings so far - Crystal Palace are the highest-ranked side definitely through to round five as it stands...

Image source, Getty Images

Tottenham boss Mauricio Pochettino: "We made two mistakes at the end of the game and we paid by now being out of the FA Cup.

"The game was always under our control. We scored in the first half and created chances to add to it. It is football. We can make a mistake but I am very disappointed because I think we expect to be through to the next round. So I'm not happy.

"Now we need to focus on the next game against Sheffield United. In football you need to look forward. It is not easy playing so many games but on the day it was about us making a mistake and that cost us the game in the last seven minutes."

A blow for the hosts as Philippe Coutinho is struggling. He clutched at his hamstring after playing a pass down the line four or five minutes ago and he's not happy about it.

Eidur Gudjohnsen then weaves into the penalty area for Bolton, half thinks about going down under a clumsy challenge, but wins a corner instead which Darren Pratley heads over.

More from Bradford City manager Phil Parkinson: "I thought we defended terrifically. We were up against world class players today but we stood up to the task. We looked like we could create all afternoon, and when you feel that way on the touchline you know you always have a chance. The day we got to the League Cup final, that result at Villa Park, was a very special one. But today in terms of the performance, that has to be the best. To come to the Premier League leaders and score four goals will take some beating. Hopefully we can beat it one day but it's terrific.

"After the game Jose Mourinho came into the dressing room and shook the hands of all the players and staff, he was very complimentary about the way we approached the game. When we get back tonight I am sure we will have a celebratory drink or two. I just want it to sink in slowly, to enjoy the moment."

Image source, Getty Images

Bradford City manager Phil Parkinson, speaking to BBC Sport: "In the the first 20 minutes we did OK but then we conceded the first goal and gifted them a second. The goal we got back before half-time gave us belief and in the second half we really took the game to them.

"We are at our best when we do that, and the way the lads stuck to the job on the pitch was absolutely superb. Kicking to our supporters in the second half was a big factor too, they made it like a home game for us. It was almost surreal when the fourth goal went in. It took a while for what we have achieved to sink in."

Joe Walsh: Almost beyond belief - we just watched Chelsea ship four goals at the Bridge to a team almost 50 places below them.

Matthew Penistone: Think David Southall (see 9 mins) forgot about Arsenal and the fact neither of those teams are actually through yet either!

Stuart: Could we see a team from outside the Premier League win the FA Cup this season? I hope so!

Send in your opinions on today's action and talking points to #bbcfacup, external on Twitter, text us on 81111 (UK only), or drop us a line on the BBC Sport Facebook, external or Google+ page., external

Bolton can't keep the ball now, their early fluidity has fallen away. Next step could be to get to half-time at 0-0.

Image source, Getty Images

Much better from Liverpool as that early pressing and hounding wears off from Bolton. Emile Heskey has got 20 minutes of high work in him these days.

Jimmy Armfield
BBC Radio 5 live

"He thought he was going for the try line! Definitely a yellow card, and there is just that bit of anxiety creeping in to Bolton's defence now."

Josh Vela is back in the Bolton midfield today after a stint wasted at right-back. He shows lovely feet to skip away from trouble but then runs back into it, losing the ball and having to rugby tackle his man to the floor. Yellow card.

Liverpool starting to control the game now after a shaky opening 15 minutes. Philippe Coutinho hits a shot which Adam Bogdan tracks all the way and holds.