Full-time: That's it. Great comeback from United. They showed their defensive frailties but Wayne Rooney was the key - having a hand in the first, scoring two and then assisting Shinji Kagawa for the winner.
Huszti fires over and that could be Hannover's last chance.
What a chance for Nani to score a fifth. Quick one-two with Valencia but his chip is too nonchalant and just wide.
They nearly get that fifth when a clearance hits Nani and nearly bounces into the net.
United passing the ball nicely now and going for a fifth. Impressive impact by the likes of Anderson and Valencia.
Goal! Kagawa scores with a nice finish in the right channel to complete the turnaround.
Anderson finds Rooney who feeds Kagawa. He is in space but delays by cutting on his left and firing weakly at Zieler.
Goal! Rooney sends Zieler the wrong way to level the scores.
Penalty! Rooney through on goal and taken down by Zieler as he goes round him.
Nani has Valencia out wide but overplays. United starting to try and force this equaliser.
Kagawa does well to get away from his man and find Rooney but the shot is tame and easily saved.
De Gea punches clear.
More good work from Abdellaoue wins a corner.
United now have Carrick and Keane at the back with Valencia at right-back. Going for the equaliser.
Vidic is off to be replaced by Valencia.
Anderson replaces Hernandez.
Now the cross comes in from the other end but Hernandez cannot get on the end of it.
Pander with a stunning volley but it is straight at De Gea.
Stindl with a bursting run, forces Carrick to concede a corner.
Pinto is given a yellow card for a cynical challenge on Rooney.
Rooney nearly finds Hernandez for the equaliser but Zieler is off his line well.
Goal! But United have scored from this one. Superb free-kick from Wayne Rooney. Curled into the top-left corner with Zieler motionless.
Another free-kick to United in a good position... Hannover scored from the last one.
That was some finish from Abdellaoue. Got extra momentum on that right-wing cross with his back-flicked finish.
Goal! Classy finish from Mohammed Abdellaoue after Hannover break quickly from Nani's free-kick.
Pinto fails to deal with De Gea's long ball and then fouls Hernandez in an advances position. Chance for Nani and Giggs to conjure something.
Tricky run from Kagawa finds Giggs and he nearly dinks the ball through to Hernandez but Hannover clear.
Hannover in down the left again and the cross finds Ya Konan but he scuffs his effort wide.
Misplaced pass from Keane allows Hannover to break. Kagawa gets back to help but then Cleverley appears to commit a foul in the box. Nothing given despite shouts from the crowd.
Great turn from Nani finds Giggs on the right. Delicious ball from the veteran and Hannover must concede a corner.
Quick feet from Ya Konan buys a yard on Evra but De Gea saves his shot.
Giggs with a free-kick now but it clips the top of the wall and is cleared.
Giggs tries to find Rooney with the outside of his right foot but the pass is blocked.
Ya Konan outmuscles Carrick and gets a shot on goal but De Gea saves.
Vidic should deal with a long ball but somehow the ball is hooked back into the United box. Impressive pressure from the home side but eventually they concede a free-kick.
Chance! Rooney plays Hernandez through one-on-one but Zieler saves. Should have scored.
Didier Ya Konan making a nuisance of himself up front for Hannover.
Shock for United. They have looked fairly comfortable but somehow find themselves losing the game.
Goal! Corner comes through to the other flank and when the cross comes in from the left Karim Haggui heads past De Gea. The centre-back has only just come on.
Now it's Hannover on the attack with Abdellaoue winning a corner.
Excellent play from Cleverley and Kagawa in the middle with the latter producing a beautiful pass to put Hernandez clear but the striker is just offside. Didn't need to be either.
Hannover kick-off and we are underway in this second half.
Eight changes for Hannover. Hopefully you'll forgive me not taking you through each of those.
Giggs on for Young.
De Gea replacing Lindegaard.
Half-time. That's the end of the first half. Good game with United impressive. The goals were both tap-ins after each keeper spilled a shot but it's been quality stuff apart from that. United passing the ball well and there are more goals for them here.
Cynical foul by Young prevents the quick break.
Nani with another cut back after Rooney finds him out left well. But Kagawa's shot is blocked again.
Classy stepover from Rooney dummies it for Kagawa but the midfielder's shot is blocked.
Cleverley then ghosts past two on the edge of the box but fires straight at Zieler.
Nani coming off the flank to give Carrick another option in midfield. Long sustained pressure from the Red Devils.
Controlled passing now from United as they look to nullify the threat and get to half-time.
Sobiech tries the acrobatic at the other end as he attempts to latch onto a right-wing cross. He misses the ball and it comes out to Rausch who shoots with his weaker right foot but Lindegaard saves well low to his right.
Nani takes it. He feigns to shoot but produces a quick pass to Hernandez who plays a one-two but Nani blasts the return way over.
Quality pass from Kagawa to Young but the cross is then behind the forwards. Cleverley is there to clean up and is fouled. Free-kick 25 yards out.
That spell leads to Young crossing for Hernandez but the forward is offside... and his header was well saved by Zieler anyway.
Possession football now as Carrick feeds little passes in to Cleverley and then Kagawa - pulling the Hannover midfield out of position.
Keane with a driven cross but it's blocked. United may have conceded here but it has been a strong display. They haven't scored twice in a game so far in pre-season but you wouldn't bet against them here.
Young, who has switched to the right, curls a ball in but it's just beyond Hernandez.
Goal! Nani does well to cut the ball back to Rooney. His shot is saved but Hernandez is there to knock home the rebound from close range.
Kagawa shoots left-footed on the edge of the box but Zieler tips over.
Nearly another for Hannover but Evra tackles well to deny the home side a second.
Vidic slides a pass through to Hernandez but he skews his shot wide.
Goal! Sobiech scores on the rebound after Lindegaard spills a long-range effort. Poor keeping.
Chance again! Keane again! Goal is open but he passes wide. Head on his hands. The youngster could have had two in a minute.
Chance! Corner is taken short and finds Kagawa. He crosses for Keane who surely can poke home but his effort is blocked on the line.
This time Nani slides in Rooney but his shot is blocked for a corner.
Nani coming back to help out and then United try to break out but the Portuguese winger cannot find Rooney.
Nice skill from Hernandez but he loses it in a dangerous area. Better from Hannover now but Carrick and Vidic dealing well with the balls coming in.
Corner comes in and Vidic volleys over. Decent chance if he keeps it down.
Nice one-two between Rooney and Cleverley. The latter's shot ricochets out to Hernandez and his cross is blocked for a corner.
Even game now. Cleverley and Kagawa trying to get hold of the ball in the middle but not getting a great deal of room.
Long ball looking for Sobiech. Evra is back to head to the keeper and does so well - nearly overhitting it but Lindegaard stretches to catch.
Nani with the cross from the right and Hernandez is free but cannot connect with the volley.
Rasch crosses from the left but that's well claimed by Lindegaard.
Nani thinks he has won a corner but a free-kick is given against him.
Good work from Rausch and Hannover having some joy in behind Evra on the United left. But this time the full-back shepherds the ball out and that's a goal-kick to the visitors.
Carrick cannot find Young on the left. The winger struggling to get into the game at this stage.
Vicious left-footed corner and Carrick does well to head away near the line with Lindegaard stationary.
Schlaudraff attempts the right-wing cross and United are forced to concede a corner.
Cleverley does well to sweep up and then Rooney turns smartly before showing great vision to put Hernandez in with the outside of his right foot. A desperate slide challenge denies the Mexican.
Excellent long pass from Carrick finds Nani but he is adjudged offside.
Second good interception from Carrick. He is growing into this defensive role and it'll help having Vidic alongside him. The Serb made his return from injury last week.
Dominant start from United but Hannover get their foot on the ball now with Andreasen.
Rooney finds Hernandez on the right. He lays the ball off to Nani who shows good skill to beat his man but the cross is too near to Zieler and he collects.
Early touches for Cleverley and Kagawa. They are the midfield duo in this one so it'll be interesting to see how the new signing gets on in a 'two'.
United kick-off and we are underway.
The players enter the pitch to a good reception and we'll be underway after the pre-match handshakes.
Fantastic crowd in Hannover for the game. Atmosphere building and the players will be out very soon.
With just three goals from five games in pre-season so far, that's an issue United will be looking to address tonight.
Tom Cleverley starts after returning from Olympic duty. Ryan Giggs is also on the bench. Michael Carrick, who has earned an England recall, will play centre-back once again.
Hannover 96: Zieler; Chahed, Avevor, Eggimann, Pander; Nikci, Andreasen, Hauger, Rausch; Sobiech, Schlaudraff.
Man Utd: Lindegaard; M Keane, Vidic, Carrick, Evra; Nani, Cleverley, Kagawa, Young; Rooney, Hernandez.
Let me know your thoughts and predictions for tonight's game. You can email me at firstname.lastname@example.org or contact me on Twitter at @GhostGoal
Our friends at Sky Bet have the odds for his one and make the Red Devils favourites. Manchester United are at 4/6, Hannover 4/1 and the draw is available at 12/5
The teams for this one will be up shortly.
Welcome to our live commentary of Manchester United's tour game with Bundesliga side Hannover 96 in Germany.
Live updates will appear here from 1920 BST...