Chelsea have definitely improved in the second half.

Johanna Rytting Kaneryd finds space on the edge of the United box and tries to slip the ball through to Mayra Ramirez but United recover.

Image source, Getty Images

Siobhan Chamberlain
Ex-England and Man Utd goalkeeper on BBC One

That is an outstanding save from Mary Earps.

The way she moves her feet so quickly to get back across her line and then the big hand to stop the ball, claw it out of the air before it could go in.

Oh my word.

Lauren James sends a looping header towards Mary Earps' goal and the England goalkeeper produces an absolutely outstanding save.

She jumps to perfection and claws it away.

Argh.

Mayra Ramirez produces an absolutely lovely run to drive through the United defence and cut inside to beat Hannah Blundell once she's in the box.

Her shot is blocked and goes behind for a corner, though.

Chelsea have been quick out the blocks as they continue their search for a way to overturn the deficit.

United counter-attack, though, and Jess Carter has to rush back to put the ball out of play before Ella Toone can latch on to a long ball.

Image source, Getty Images

The second half is under way.

Sanny Rudravajhala
BBC Radio 5 Live reporter at Leigh Sports Village

Her name was received with boos by the United fans as Chelsea's goalscorer was announced by Lauren James has given a foothold for the holders in this contest.

United had been comfortable for long periods and there've been some fascinating battles across the pitch so far.

Both managers have been patrolling their technical areas, and you'd expect a big reaction from.Chelsea in this second half.

Ex-red James got a hat-trick in their league encounter and the United players have been targeting her from the off. A coming together inside the goal in her trying to get the ball has given her a yellow card, so watch this space.

They're just coming out now, here we go!

We're about to restart - here's how Lauren James pulled a goal back for Chelsea.

Ellen White
Former England striker on BBC One

Chelsea galvanised themselves, got back together after two nil and said 'What can we do?'

It is about getting in those right positions and getting the right people on the ball, and Lauren James is very good in and around that six yard box.

Want something to fill the rest of the half-time break?

Before today's game, Ella Toone and Nikita Parris sat down with BBC Sport's Jo Currie to test their FA Cup knowledge.

Rachel Brown-Finnis
Ex-England goalkeeper on BBC Two

Manchester United started as if this game was a revenge match for the final they lost to Chelsea last year.

They had energy, took the impetus and looked dangerous, and we haven't seen very much of that from them this season. They brought it today.

Fire, energy and revenge and they kept it up throughout the whole first half. It was an impressive, aggressive and feisty performance from United.

Leicester City

Leicester forward Lena Petermann speaking to BBC Two: "Really sad, disappointed that we didn't win today. On the other hand I'm really proud of my team. We should have gone to the final.

"We were up until the 80th minute. There was a late goal but it's never over. Maybe we need to be smarter in those final moments. It is how it is, we will learn from it."

On whether the disappointment can help Leicester in the league: "It's a big frustration. Next week, we have another big game, nice game [against Arsenal at the Emirates Stadium]. We take all the frustration and look for a win."

Tottenham Hotspur

Tottenham matchwinner Martha Thomas speaking on BBC Two: "I'm just so chuffed that we got over the line."

On scoring the winner: "I just thought you have to get in front of this defender. I didn't want penalties! I'm just so happy for us. We dug deep and came from behind and won."

On what it means for Tottenham: "It's huge. I'm lost for words but we're such a tight knit group that work hard for each other and I'm just so chuffed for us."

On using her experience of playing in an FA Cup final: "We've got quite a few people here that have played in the final and won it so we'll all be using the experience for the occasion and I guess we'll just see who we're playing."

Leicester City

Leicester interim manager Jennifer Foster speaking to BBC Two: "It's going to hurt and it's going to hurt for a little while which is understandable because I thought the effort and everything that the players put in today was brilliant. Genuinely couldn't have asked any more. I think obviously it was just those clinical moments from Tottenham. It's disappointing, I thought it was going to end up going to penalties in the end."

On what she said to the players after the match: "It was just to stay composed in moments because I think some of our detail at times allowed Tottenham's transitions which is obviously where they're going to hurt us. It was just about keeping the ball down and we did that at times. We probably don't create clean enough chances when we wanted to."

On the feeling in the camp: "Huge disappointment but I said to the players this won't be the last time we're in a semi-final. People don't look at us as a big team but we are a big team and that's the way we need to look at ourselves moving forward and for the rest of the season. Immensely disappointed but couldn't take any more from the players."

Tottenham Hotspur

Tottenham boss Robert Vilahamn speaking to BBC Sport: "We worked so hard for this and when you get this in extra-time, I am so impressed."

On thinking it was going to penalties: "I was quite calm because we are good in penalties. We knew we were going to get one more chance and we got it and we took care of it.

"We started quite good but they scored that goal and were good for a while. We were better in the end. It was not the perfect game, but who cares.

"We learned so much, how to play better, how to turn around games, how to win games."

On the atmosphere at Tottenham Hotspur Stadium: "We are building something unique with this fan base here because you can tell they are buying into it and they love it. They give us the energy and when you hear them you feel goosebumps all over your body. It’s amazing."

Whoever wins at Leigh Sports Village will meet Tottenham at Wembley after they beat Leicester early today.

You can watch highlights from that game below and we'll be bringing you the reaction from both sides.

Michael Emons
BBC Sport at Leigh Sports Village

Manchester United go in with the lead, but there is still a huge amount of work to do to ensure a Wembley final against Tottenham.

The hosts capitalised on Eve Perisset's error to opening the scoring inside the opening 60 seconds with Lucia Garcia heading in from Leah Galton's cross.

Another ball into the box, this time from Ella Toone, led to United's second with Rachel Williams providing the header.

But United were expecting a strong response from Chelsea and it came as they ended the half strongly. Mary Earps did well to save from Lauren James in the third minute of added on time, before James was free and fired into the net to give Chelsea a lifeline.

United with the advantage, but the second half is set up perfectly.

Siobhan Chamberlain
Ex-England and Man Utd goalkeeper on BBC One

Chelsea have turned the tide a bit, got the goal, now do they stick with what they have to push on or do they make changes? They have the momentum in the game now.

Plenty to think about for Emma Hayes at half time.

Manchester United's first-half dominance is cut short as Chelsea pull a goal back just before the break.

Will they be able to turn things around completely?

Image source, Getty Images

Millie Turner and Lauren James were booked after the goal as Turner held the ball and Lauren James tried to take it back to restart the game.