Postpublished at 88 mins
Chelsea 2-0 Southampton
Two minutes of normal time remaining.
Antonio Conte is heading for another suit fitting!
Chelsea are close to the FA Cup final for the second successive season.
Listen on BBC Radio 5 live & online
Winner faces Man Utd at Wembley on Saturday 19 May
Chelsea have won 11 of their last 14 FA Cup semi-final matches
Southampton's first FA Cup semi-finals since 2003
Neil Johnston
Chelsea 2-0 Southampton
Two minutes of normal time remaining.
Antonio Conte is heading for another suit fitting!
Chelsea are close to the FA Cup final for the second successive season.
#bbcfootball or 81111 on text
Donald: Another one from the Azpilicueta-Morata express.
Roch: Morata's head is so clinical. His head took all the finishing ability of his feet.
Viresh: That's all Morata needed, a brilliant cross from Azpilicueta.
Chelsea 2-0 Southampton
End-to-end!
Charlie Austin hits the face of the post after stretching inside the area then Alvaro Morata is denied by a clearance off the line.
Chelsea 2-0 Southampton
Chris Sutton
Ex-Chelsea striker on BBC Radio 5 live
What an impact from Morata. Downwards header from Cesar Azpilicueta's cross, he's been on the field a matter of minutes.
Game over. Tremendous header, McCarthy no chance.
Alvaro Morata
Super sub Morata! Chelsea are heading for the FA Cup final...
He's only been on the pitch for a few moments but Alvaro Morata finds the net with a powerful header after replacing Olivier Giroud.
Surely that's enough?
#bbcfootball or 81111 on text
Lewis: Goalkeepers way too protected nowadays. Nothing wrong with challenging a goalkeeper. Should be 1-1.
Dubsguy: You'd expect VAR to be used there. Didn't look like anything wrong on the replay
Chelsea 1-0 Southampton
Chris Sutton
Ex-Chelsea striker on BBC Radio 5 live
It's an odd decision from Caballero not to catch the ball higher or jump and catch it, there's not a lot in that. It is a contact sport, there's the slightest nudge from Charlie Austin.
Chelsea 1-0 Southampton
Eden Hazard has been outstanding for Chelsea.
He glides past a couple of Saints players before delivering a low cross which takes a double deflection before landing on the roof of the net.
It comes moments after Willy Caballero escapes after dropping the ball over his own line but Charlie Austin is adjudged to have fouled the Chelsea keeper.
Chelsea 1-0 Southampton
Around 20 minutes to go.
It's a Manchester United v Chelsea final as it stands but Southampton have suddenly woken up.
Can they force an equaliser?
Chelsea have lost their way a little since Willian left the pitch.
Chelsea 1-0 Southampton
Why couldn't Southampton play like this earlier?
Nathan Redmond hammers the ball from 25 yards and Willy Caballero is going the wrong way.
The Chelsea keeper somehow gets enough on it to divert it behind.
He didn't know too much about it but that's a great save.
Chelsea 1-0 Southampton
Chris Sutton
Ex-Chelsea striker on BBC Radio 5 live
Southampton are giving it a go, the fans sense something. Southampton for the first time are really pushing Chelsea back.
Chelsea 1-0 Southampton
Lots of noise from Southampton's fans.
They haven't given up on this and neither have the players.
Saints win two successive corners but cannot trouble Chelsea.
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Josh: Tadic & Redmond, 2 dangerous players on for Southampton
Donald: Bakayoko in for Willian sounds like a gamble to me. He still has a lot of convincing to do.
Chelsea 1-0 Southampton
Double change for Southampton.
Dusan Tadic and Nathan Redmond are on while Tiemoue Bakayoko is getting ready to come on for Chelsea.
It's Willian who is getting hooked. It looks like he might have picked up a knock.
You can watch Olivier Giroud's brilliant goal here.
Simply stunning.
Chelsea 1-0 Southampton
There's a delay while Olivier Giroud gets treatment after a challenge from Oriol Romeu.
Chelsea's goalscorer is able to continue but there is movement on the Southampton bench.
They have to respond. What has Mark Hughes got up his sleeve?
Chelsea 1-0 Southampton
Another replay of Chelsea's goal...it's an outrageous piece of skill by Giroud. Well worth a watch on Match of the Day on BBC One at 23:30 BST.
Chelsea 1-0 Southampton
Chris Sutton
Ex-Chelsea striker on BBC Radio 5 live
That was the chance for Southampton. Long is not a natural finisher, it was brilliant from Charlie Austin to put him through but he takes such a heavy touch. That is guilt-edged, a golden chance for Southampton.
Chelsea 1-0 Southampton
Chelsea 1-0 Southampton
This game isn't over.
Charlie Austin plays a sublime defence-splitting ball for Shane Long but his first touch is way too heavy.
That was a great chance for Southampton and Long has fluffed it.