It's time to wrap this. So, now we know the first major domestic silverware of the season will be contested between Chelsea and Tottenham. Sheffield United gave it everything and could yet face an FA Cup date with Manchester United. But it's Spurs who are going to Wembley. Time to wheel out Chas and Dave.
- Eriksen scores two to put Spurs into League Cup final
- Tottenham to meet Chelsea at Wembley on 1 March
- 18-year-old Adams nets twice in late Blades fightback
- Copa del Rey: Atletico 2-3 Barcelona (Agg: 2-4)
- Atletico finish with nine men after stormy clash
Matt, Manchester: Is nobody going to comment on Jan Vertonghen grabbing a player by the throat and pushing him to the floor? A blatant red card completely ignored.
Sheffield United goalscorer Che Adams: "I want some more appearances like that but it won't be in this cup and I'm cup tied for the other one! I played for Ilkeston in the preliminary rounds.
"It was crazy! Some of the Spurs players play for England, they're French! I'm proud. It is a lot to take in.
"I am getting texts every day but I am trying to keep my head down. The manager knows what I can do and I did it tonight. It was unfortunate tonight. I didn't know what to do when I scored."
Here's the latest update from the hospital, where Tricia has given birth to a baby boy named Harry. We asked if the little lad was named after Mr Kane...
Tricia in Portsmouth: A family name actually..."it's one of our own, it's one of our own!"
What a terrific finish. And you can watch it again, with highlights of tonight's clash between Sheffield United and Tottenham on theLeague Cup Show.
Join Manish and the team at 23:15 GMT on BBC One, or if you're a resident of Scotland, Wales or Northern Ireland, from 23:40 GMT.
Sheffield United's next game? Swindon at home in League One this Saturday. The Blades are in their fourth straight season in the third-tier.
Tottenham defender Kyle Walker speaking on Sky Sports: "The dressing room is very happy and it is always great to get to a final and hopefully we can now go on and win it.
"From the first game we saw how organised Sheffield United were and we knew they would cause us problems. We had to make sure we matched them for work rate. Sheffield United pulled some goals back but we showed some bottle and Christian came up with the winner.
"We always believe we can score at the end of games as we have done it so many times this season. Chelsea are a fantastic team but we are hoping to go to Wembley and win."
Former Tottenham and England defenderLedley King: Great for Spurs to reach the League Cup final. Brilliant from Christian Eriksen. Could history repeat itself against Chelsea at Wembley?
Tottenham defeated Chelsea 2-1 in the 2008 League Cup final, with goals from Dimitar Berbatov and Jonathan Woodgate.
Tottenham manager Mauricio Pochettino on the Football League Show: "For sure I was worried, it is football! Over the two legs we deserved to go to Wembley but you need to create chances, score and kill the game.
"We gave the possibility to Sheffield and when they scored the second goal it was difficult. Football is emotion. Now we are happy for the players, they deserve the right to play at Wembley and for our supporters it is the most important goal.
"It is my first final at Wembley, it is new to me and new to a lot of our players, but we will enjoy it."
No doubt Tottenham fans are already making plans for their big Wembley day out on 1 March, but Spurs have some big game between now and then. They have four Premier League fixtures against West Brom (a), Arsenal (h), Liverpool (a) and West Ham (h). In addition, they face Italian side Fiorentina in the last-32 of the Europa League over two legs on 19 and 26 February.
Dan: Moments like this don't happen very often for Spurs? Third League Cup final and fifth Wembley appearance in seven years.
Sheffield United boss Nigel Clough speaking on Sky Sports: "I am incredibly proud of the players and what they gave over the two games. It was just a bit of quality that made the difference. Eriksen's two goals tonight were superb.
"When we were a goal down we knew one goal would change the complexion of the game and the crowd really got into it. We are delighted with Che Adams tonight, we like the look of him. But he is still quite raw but he has lots of potential.
"We will take lots of positives from tonight and when we get the crowd behind us we are a force at home."
It's Mauricio Pochettino's 43rd birthday the day after the League Cup final. What a present for the Argentine if his Spurs players can defeat Chelsea and land silverware in his first season in charge at White Hart Lane.
Tricia in Portsmouth: Still watching in hospital... looks like little Harry is getting the full Spurs experience on his first day in the world!
One question from the BBC Sport team, Tricia. Is Harry named after Harry Kane? Or Harry Redknapp?
Tottenham's two-goal hero Christian Eriksen speaking to Sky Sports: "Sheffield United definitely gave us a big fight. They gained confidence after they scored their first goal, the second one was a bit lucky but we came back at the end.
"This season when we have been in front we have given stupid goals away and it is something we need to stop doing. Chelsea will probably want revenge in the final but I am really looking forward it."
Credit to Sheffield United for pushing Tottenham so far. The League One club put up a terrific fight in the end and could yet have another big cup date to look forward to. Nigel Clough's side will entertain Manchester United in the fifth round of the FA Cup if the Blades see off Preston in a replay next week and Louis van Gaal's side defeat Cambridge.
It's party time for Tottenham's 5,500 travelling fans. None of them are leaving as Mauricio Pochettino's players head to the away area at Bramall Lane to salute them. Moments like this don't happen very often for Spurs. They're lapping it up.
Now Atletico are down to nine men as Mario Suarez receives his marching orders for a second yellow card.
Former Republic of Ireland winger Kevin Kilbane at Bramall Lane
"It's the fourth time this season that Christian Eriksen has scored after the 87th minute. It just shows energy and drive, and that Tottenham are always pushing forward."
What a terrific finish to this semi-final. Spurs looked to be cruising into the final before 18-year-old substitute Che Adams struck twice in the space of two minutes to turn the tie on its head. But the night belongs to Tottenham thanks to Christian Eriksen.
Chelsea v Tottenham at Wembley on 1 March. Get it in your diary. Now.
Tottenham are going to Wembley thanks to Christian Eriksen.
Michael Vorm climbs to his feet after treatment and play continues. Last few moments.
Late drama. Chris Basham is through but Spurs keeper Michel Vorm comes rushing off his line to snuff out the danger. The pair collide and Jan Vertonghen grabs the United player by the neck. Vorm remains down and is receiving treatment.
Tottenham's players are using all their Premier League experience to eat up a few seconds. This has been a great effort by Sheffield United but Spurs fans have already started celebrating. Time for one last twist?
Born Che Zach Everton Fred Adams, Sheffield United's main man tonight was watched by just the 45 scouts at one match when he turned out for non-League Ilkeston.
The 18-year-old interested the likes of Huddersfield Town, Peterborough United and Crewe Alexandra, but became a Blade in November of last year.
"Che is one of those players that comes along every so often and makes you think, 'wow'," said Kevin Wilson, who gave the midfielder his debut in the non-league.
"His biggest asset is that knack of changing games in the blink of an eye."
Wise words it seems.
Four minutes added time. Can Sheffield United respond?
We've got less than 20 minutes to go in the Spanish capital, and Barcelona appear in total control against 10-man Atletico. One goal could change everything, though.
Astonishing. There's three minutes left on the clock when Harry Kane slices the Blades defence wide open with a superb pass that sends Christian Eriksen through, the Dane showing great composure to find the net with a low finish. Classy finish. Spurs are back on track for Wembley.
What has happened to Tottenham's defence? Louis Reed has sight of the Spurs goal and tries his luck..his shot just clearing the bar. There's only one team in this now. Premier League Tottenham are hanging on for extra time against League One Sheffield United.
What a story. This tie has come alive thanks to an 18-year-old and Tottenham's 5,500 travelling fans are stunned. We're heading for extra time.
BBC Radio 5 live
"That is outstanding! He had the presence of mind to bring it down and that is two wonderful finishes from Che Adams."
Would you believe it.
Teenage substitute Che Adams has turned this tie upside down in the space of a minute. The 18-year-old finds the net from 15 yards with a deflected shot after Jamie Murphy's cross. Spurs boss Mauricio Pochettino looks bewildered. Astonishing.
BBC Radio 5 live
"This makes it interesting! Ryan Flynn's cross was excellent and what a lovely finish from the youngster. He's only 18!"
Who said this tie was over?
Sheffield United are right back in this as young substitute Che Adams keeps his composure to turn Ryan Flynn's cross over the line. Bramall Lane is rocking again.
Spurs might be heading for Wembley but there's fireworks between team-mates Michel Vorm and Eric Dier. Keeper Vorm is unhappy with his defender over something and is giving him a right mouthful.