There goes the final whistle. A 2-0 win for Swansea before the second leg at the Liberty Stadium in a fortnight's time. Huge chance for Swansea to reach the final.
Ba clips the ball into the net from Lampard's flick on, but he is offside. What a finish to this match. Three minutes of time added on almost up.
GOAL! Graham slams the ball into the vacant net after a horrid error by Ivanovic with a short passback. A 2-0 lead now for Swansea. Would you believe this.
Ba gets in an ahead of Tremmel. Appeals for a penalty, but referee says no. And Ba is going to be booked for a dive.
Ba rises to head past the post. Doesn't look like it is going to be the home side's night here.
Ivanovic picks out the run of Ba in the Swansea box. Decent header, but good height for Tremmel to make the stop this time.
Frustration all too obvious for Chelsea as Luiz knocks a shot wide of goal.
Michu is also going to exit the scene with Danny Graham introduced for the Spanish forward.
Marko Marin replaces Oscar for the home side.
Lampard unloads a shot from 25 yards out. Plenty of pace, but no real direction as Tremmel dives to make a comfortable stop.
Michu on the run for Swansea, but just sets off too soon. And he is offside.
Another change for Chelsea as Torres departs to be replaced by Demba Ba.
Williams drills the ball long from deep. Chelsea growing increasingly anxious here as they try to find this equaliser.
Williams under pressure from Torres, but does enough to get the ball back to Tremmel.
Flores takes a bit of a sore one after spinning off the park. No real damage done as Swansea close on this win.
Oscar with an inviting cross into the heart of the Swansea area, but Tremmel does enough to clear the danger.
Chelsea have won three and lost none of their last five clashes with the Swans in all competitions, though both sides have netted in all five of these games.
Ivanovic on the dash for Chelsea, but no real chance of keeping that ball in play. Swansea so well organised in this match.
Mata picks out Torres, whose flicked header is easily taken out of the air by Tremmel. Swansea inching towards a famous win here.
Luiz scrambles the ball away after De Guzman had sent a free-kick into the home box looking for Michu.
Williams enjoying another commanding performance at the heart of the Swansea defence.
Lampard is brought on to take over from Ramires for the home side.
Hernandez alert to block the cross from Oscar. Chelsea trying to engineer some space. Swansea with everybody behind the ball.
Looks like Lampard is going to finally see some action with 20 minutes or so left on the clock.
Mata sends the free-kick into the visiting box, but straight out of play. Disappointing end to that latest move.
Davies has been penalised for a late challenge on Hazard. Chance then for Chelsea to apply some pressure.
Mata tries to release Hazard, but a superb piece of defending by Rangel helps Swansea recover the situation.
Williams rises to head clear the Luiz cross and Swansea can break to the other end.
More applause for Frank Lampard as he continues his warm-up on the side of the park. Wonder if he is going to be wheeled on here?
Michu catches Ramires with a late one. No real malice in that challenge. Swansea can get bodies behind the ball again.
Oscar and Ramires looking to break, but a fine piece of defending by Davies sees another Chelsea move bite the dust.
Dwight Tiendalli is introduced to take over from Routledge for the visiting side.
Looks like a fan is on the park here. Meanwhile, Swansea are going to suffle their pack.
Chelsea now up to 15 attempts at goal compared to only three by Swansea. But the visiting side continue to hold this 1-0 lead.
Tremmel dives low to his right to prevent the shot by Luiz hitting the net. Solid hit, but a fine stop.
Chelsea continue to push and probe as Swansea are forced to retreat deeper and deeper.
Luiz gets the ball through the wall, but the effort creeps a yard wide of goal. Goalkick to the visiting side.
De Guzman fouls Luiz and Chelsea have a free-kick chance from 40 yards out.
Ki doing well to win the ball from Ivanovic before Michu sends a volley well over the bar after Swansea had attacked at pace.
Hazard sees a shot deflect wide from distance. Swansea won't complain about those efforts. Will happily take those all night long.
Ki doing well to cover up any danger. Easy pickings for Tremmel in that Swansea goal.
Cole takes up a decent position out wide, but can only lift the cross straight out of play.
Chelsea had 12 shots in the first half - 10 more than Swansea - but only three were on target - both of Swansea's were.
Luiz with a free-kick chance 30 yards from goal. Goes for goal, but rattles the ball a couple of yards over the bar.
Chico Flores has picked up a booking after a late tackle on Torres, who earns his side a free-kick just outside the visiting box.
An offside flag goes up against Torres. Chelsea looking to hit back early in the second half.
We are off and running then in the second half.
Decent delivery by Mata, but Luiz's ball back across goal is cleared by Swansea. There goes the whistle for the break. A shock 1-0 lead for Swansea.
We are into one minute of time added on to the first half.
Ivanovic taken out of the action 25 yards from the visiting goal. Late chance in the half for Chelsea.
Michu has now scored five goals in just four appearances in London this season.
Tremmel dives to nudge an Ivanovic effort away from goal. Good hit, but solid stop by the goalkeeper.
Referee wanting to speak to Hernandez after he fouled Oscar. He is booked for a late challenge.
Chelsea all over the place at the back. Obvious mistake by Ivanovic, but the finishing was clinical. Swansea holding this lead with their first attack of the night.
GOAL! Michu sends a shot spinning into the corner of the net. Superb finish after Ivanovic had presented the ball straight to De Guzman. A 16th goal of the season.
Frank Lampard is given a huge ovation by the home fans as he comes out to warm up.
Luiz uncorks a shot from distance, but the ball is wide of goal. Chelsea continue to search for the first goal.
Ivanovic having to hold off the run of Hernandez. Williams then clears the ball from Oscar's cross after he had gone beyond Davies.
Rafa Benitez’s side have only won two of their last six home games in all competitions, drawing three and losing one.
Oscar just fails to control another lovely pass by Luiz. Swansea making life difficult for Chelsea. Little or no space in that visiting box.
Torres running into a spot of trouble as Ki does the clearing up business. Swansea so tough to break down.
Tremmel out to win the ball ahead of Mata. Torres seems to have taken a bit of a knock.
Oscar sends Mata racing clear with a lovely little flick, but he screws the shot inches wide of goal. Sublime awareness by Oscar.
Rangel dashing back to win the ball from Hazard. Chelsea continue with plenty of possession against the wall of red shirts.
Luiz managing to tidy up at the back with Michu trying to find some space in the home area.
Cole taking no chances as he picks out Turnbull, who hammers it long looking for Hazard.
Hazard picks out Mata after a probing run, but the shot lacks the direction and Tremmel makes an easy stop. Nice attacking move.
Chelsea with their third corner of the night. Decent ball in by Mata, but Cahill can only nod over the bar.
Cahill decides to try his luck from distance, but well wide of the visiting goal. Swansea tactics continue to work well so far.
César Azpilicueta drills an effort a couple of yards wide. Chelsea really toiling to find an opening so far in this match.
Williams well positioned to head clear the ball into the middle from Mata. Chelsea not lacking spirit.
Ki feeds Michu, whose shot is low and hard. But not really containing the pace to elude Turnbull. A comfortable enough stop for him.
Cahill comes out to knock the ball away from Routledge before he wallops it long seconds later.
Chelsea and Swansea have met once before in the League Cup, with Chelsea winning 3-2 at home in round four back in 1965.
Swansea content to let Chelsea have the ball while trying to play on the counter attack. Chico Flores has possession deep in his own half.
Oscar with the ball out wide before Ki nips in to win the ball ahead of Ramires. Chelsea continue to keep possession.
Rangel rises to head clear the danger from Mata's cross. Swansea continue to defend deeply and stoutly.
Swansea have not kept a clean sheet in any of their last 19 League Cup games away from home, conceding 41 goals in total. Held up so far tonight.
Hernandez can't engineer the ball past Branislav Ivanovic out wide. Swansea yet to test that Chelsea goal.
De Guzman is caught offside after setting off too soon. Plenty of animation in this match without a goal.
Chelsea have had more shots on target than any other side in the League Cup this season with their collection of 36.
Hazard with a lovely pass into the path of Ramires, who prods the shot at goal. Straight into the arms of Tremmel. Looked set to hit the net there. We remain at 0-0.
Hazard flicks the ball into the path of Torres, who turns before hammering a shot well over the bar from distance.
Decent ball in by Hazard. Luiz keeps in it, but safely into the palms of Tremmel. Bright start by Chelsea here.
Ivanovic nods over the bar seconds later. Chico then back to cut out the cross by Cole. Another Chelsea corner here.
Williams doing really well to turn an Oscar cross behind his own goal for a corner to Chelsea. Mata's delivery just falling behind Luiz.
Luiz trying to pick out the run of Torres with a longish pass, but the Spanish forward just fails to collect as the ball runs through to Tremmel.
De Guzman sent tumbling to the deck before Michu is caught offside from a free-kick.
Hazard on the charge for Chelsea. Picks out Cole before he sees a cross blocked. Chelsea pinning back the visiting side. Nice possession play.
Oscar takes a tumble under pressure from Ki. Mata's free-kick ends up safely in the arms of Tremmel.
Luiz gets the ball back to Turnbull in the home goal. He hammers the ball long. Both teams trying to get on the ball here.
We are off and running then. Swansea get the party started.
Teams in the tunnel. Chelsea in blue, Swansea in red. Almost ready to go in this one. Should be an interesting evening.
Chelsea will be appearing in the League Cup semi-final for the 11th time. They have progressed through to the final in six of their previous 10, including the last three. Swansea, meanwhile, have never made the last four of this competition and have not made the semis of a major domestic cup since the 1964 FA Cup, where they were beaten by Preston.
Odds on this match if you are after a flutter this evening: Chelsea 4/9, Swansea 7/1, draw 15/4.
Michael Laudrup: “It’s a very important game for everyone at the club. But we have good confidence when we play against the big teams. We played four very different games over the Christmas and New Year period, and we didn’t lose one – that breeds confidence. The last two months have been very positive for us, we have only lost twice in that time and we have a great spirit within the squad."
Rafa Benitez: "We want to win every game, we know it's a semi-final and we will try to be in the final. We have a lot of respect for Swansea, they are a good team and they are doing well. It could be an interesting game for the fans. It's important to get to the final with my team, and my team now is Chelsea. I will try to do my best for my club, if we can win every trophy I will be very pleased."
Gerhard Tremmel starts in goal when Swansea travel to Chelsea. The German has played throughout the run to the last four, and manager Michael Laudrup feels Tremmel has earned the right to keep his place ahead of Michel Vorm as Swansea chase a first appearance at a major Wembley final. Angel Rangel is available after a calf problem, while Pablo Hernandez, Ashley Williams and Michu all return to the starting line-up at Stamford Bridge.
Chelsea interim manager Rafael Benitez has no fresh injury concerns. Petr Cech (groin) and John Terry (knee) remain out, although the latter could play for with the Blues' Under-21 squad on Thursday. John Obi Mikel and Victor Moses are also unavailable having left for African Cup of Nations duty with Nigeria. Fernando Torres is deployed up front with Mata and Hazard supporting him in an attack-minded home side. Frank Lampard does not start for Chelsea.
Teams: Chelsea: Turnbull, Azpilicueta, Ivanovic, Cahill, Cole, David Luiz, Ramires, Mata, Oscar, Hazard, Torres..subs: Hilario, Bertrand, Ferreira, Lampard, Marin, Ake, Demba Ba////Swansea: Tremmel; Rangel, Chico, Williams, Davies; Routledge, Britton, de Guzman, Ki, Hernandez; Michu..subs: Vorm, Monk, Tiendalli, Agustien, Shechter, Dyer, Graham
Good evening and welcome to LIVE coverage of the second League Cup semi-final first leg from Stamford Bridge as Chelsea host Swansea City in an all-Premier League match. Teams coming right up.