Last Updated: 23/01/14 6:18am
Mannone saves it and Sunderland win it and they are going to Wembley. What an astonishing penalty shoot-out of failures that was.
GOAL: What a finish as Hernandez rescues it for United and saves De Gea's blushes. Januzaj swaps passes with Smalling and crosses for Hernandez to score from close-range.
GOAL: What a mistake by De Gea as he fails to deal with Bardsley's shot and he lets it slip through his grasp and into the net.
Sunderland so close to scoring as Bardsley fizzes a dangerous cross right across the face of goal, but no one can get on the end of it and the chance goes begging.
United try to catch Sunderland on the break again as Januzaj feeds Hernandez who runs down the right before losing the ball.
Welbeck has a sight of goal, but his shot is too close to Mannone and is easily saved by the Sunderland keeper.
Great chance for United as Januzaj sends Hernandez clear on goal, but the normally deadly striker curls his shot wide of the target with only Mannone to beat.
Johnson tees up Bardsley on the edge of the box, but the defender drags his effort wide of the target.
Good defending from O'Shea to hold up Welbeck as he tried to get on the end of Hernandez's flick inside the box.
Gardner takes the free-kick, but his effort goes just over the crossbar with De Gea having the shot covered.
Valencia skins Alonso down the right, but his cross is cut out and put behind for a corner. Mannone shows good hands to take the corner cleanly.
That's it as the referee brings the 90 minutes to a close and we are heading into extra-time to see who will meet Manchester City in the final.
O'Shea is booked as he brings down Hernandez right on the edge of the box. Final chance here for the home side.
Smalling gets on the end of Januzaj's corner, but his header lacks the power to trouble Mannone who collects it with ease.
Really good spell from Sunderland as they push United back. Borini has a sight of goal, but the ball won't come down quick enough and his acrobatic volley under pressure from some United defender flies wide of the target.
Johnson cuts in from the right past Buttner and fires in a shot which De Gea collects at his near post.
Great effort from Alonso as he bends his half volley effort just wide of the target with De Gea at full-stretch.
Big call from referee Mason as Smalling looks as if he hauls down Fletcher as he tries to get round the defender, but the official gives nothing and allows play to continue.
Good spell from Sunderland and Johnson tries to find Fletcher at the back post, but Carrick gets up well to clear the danger.
Big chance for Johnson as he takes Borini's cross on his chest and his volley is deflected behind by Buttner.
What a waste from Carrick as United try to catch Sunderland on the break, but the midfielder's final pass finds no one and runs out of play for a goalkick.
From the corner Welbeck almost gets on the end of it but Borini does well to put pressure on Welbeck and the ball loops into the arms of Mannone.
Deflected effort from Januzaj loops high into the air and falls just wide of the far post for a corner to United.
Big chance for Januzaj as Valencia picks him out unmarked on the edge of the box, but he slices his shot well wide of the target.
Januzaj finds space on the edge of the box, but cuts across his shot and drags it wide of the target.
Good tracking back from Januzaj as he puts Johnson under pressure and the Sunderland man runs the ball out of play.
This is a good spell for Sunderland as they are dominating possession in the last five to ten minutes.
Januzaj swaps passes with Carrick before trying his luck from 30 yards and his effort fizzes just wide of the target.
Johnson has a sight of goal, but his shot fails to hit the target with the Sunderland man convinced his effort struck Michael Carrick before going wide. However, the referee disagrees and fails to award Sunderland a corner .
Sunderland work the corner short and Ki crosses it over and Smalling does well to head it behind for another corner under pressure from O'Shea. From the second corner Smalling rises highest to powerfully head the ball away from danger.
United work the corner short and Rafael has oceans of space on the edge of the box, but his left-footed shot is too high and flies over the crossbar.
Januzaj takes the free-kick he gets it up over the wall, but not down in time as it goes over the crossbar.
The referee brings the first half to a close with United going in at the break 1-0 up meaning it is all square at 2-2 on aggregate.
Good ball in from Borini but Fletcher under pressure from Smalling is unable to get his head on the cross.
Looks like Danny Welbeck is struggling after picking up a knock. We will see if he can run that off.
Sunderland go so close to scoring as Brown gets on the end of Johnson's corner and his header is cleared in front of his own line by Buttner.
That goal should take some of the anxiety out of the United players after Sunderland had defended well up to that point.
Jonny Evans finds the net from close-range with a header as he ghosts in at the back post to get on the end of Welbeck's shot.
United go close to breaking the deadlock as Fletcher hits the post from Kagawa's cross and then from the follow up Mannone produces a fine save to keep out Welbeck.
Borini brings down Rafael and is given a ticking off by Mason in what is likely to be a final warning for the on-loan Liverpool striker before he is booked for his next offence.
Welbeck cuts in from the left and blasts his shot well over the crossbar much to the delight of the travelling Sunderland fans.
Great pass from Januzaj to find Rafael's run into the box, but Borini gets back to make two important blocks on the Brazilian's intended cross.
Buttner tries his luck from the edge of the box after the ball drops to him, but he gets his shot all wrong slicing it horribly wide of the target.
First sight of goal for Sunderland as Borini latches onto a long ball upfield from Johnson and flashes his half-volley just over the crossbar.
Good strong tackle from Cattermole on Hernandez to take the ball and the Mexican is still feeling the affects of that tackle.
After a nice passing move Ki tries his luck from 30 yards, but chokes his shot and drags his shot well wide of the target.
Sunderland starting to get a hold of the ball now as they look to find some openings in the United defence.
Great save from Mannone as Hernandez gets on the end of Januzaj's free-kick to head goalwards, but the Sunderland keeper was alert to push out the Mexican's effort. First real scare for Sunderland.
United win a free-kick wide on the right as Borini brings down Januzaj. Lucky to escape a booking for that challenge.
Nathan Collison is expecting a Manchester United v Manchester City final at Wembley with United winning 2-0 tonight.
Paul Dee has put his money where his mouth is and is on 2-1 to Sunderland which is an 8/1 shot with Skybet.
Barry Lee South Carolina is also happy with United's attacking line-up with Hernandez and Kagawa starting.
Christopher Hodgetts is not too confident of Manchester United overturning the first leg deficit feeling Sunderland will go through.
Manchester United fan Luke Baker is also happy with David Moyes' team selection and is expecting a 4-1 win for United.
Matt Barber from Huddersfield is plumping for a 1-1 draw which will send Sunderland through to Wembley.
Manchester United fan Liam Ross is confident and is going for a 4-0 win for the home side and is happy to see Kagawa get a start.
Aaron Charlton believes Sunderland can pull off another shock and win 1-0 to book their place in the final. What are your predictions?
What are your score predictions for tonight's game? Feel free to air your opinions throughout the game by emailing me or sending me a tweet.
What do you make of the team news for both sides? Still no Wayne Rooney or Robin van Persie for the home side
If you would like to get in contact at any point this afternoon then please don't hesitate. You can mail me via the Score Centre, email me direct on firstname.lastname@example.org and you can also now Tweet me: @skysportspeteo.
Sunderland starting XI: Mannone, Bardsley, Brown, O'Shea, Alonso, Ki, Cattermole, Colback, Johnson, Fletcher, Borini.
Man Utd starting XI: De Gea, Rafael Da Silva, Smalling, Evans, Buttner,Fletcher, Carrick, Januzaj, Kagawa, Welbeck, Hernandez.
Whilst we wait for the team news, why not visit our friends at SkyBet for a little flutter. Man Utd 30/100 Draw 19/4 Sunderland 9/1