Paul Mullin was injured in the first 20 minutes after colliding with United’s goalkeeper Nathan Bishop, forcing the forward out of the game.
But minutes later, the Red Dragons hammered in their first of the night thanks to Elliott Lee. Soon after, Aaron Hayden doubled the Welsh side’s lead with a header.
Just seconds before the half, United get one back.
It has been a memorable tour of the States for Ryan Reynolds and Rob McElhenney‘s newly-promoted Wrexham, with matches against Chelsea and LA Galaxy.
- Kick-off: 3.30am BST/ 10.30pm ET
- TV channel/ live stream: MUTV (all)/ ESPN+ (US)
- Man Utd XI: Bishop, Evans, Fernandez, Gore, Hannibal, Shoretire, Fish, Hugill, Jurado, Hansen-Aaroen, Collyer.
- Wrexham XI: Foster, Hayden, Tozer, Cleworth, Forde, O’Connor, McAlinden, Lee, McFadzean, Palmer, Mullin.
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Manchester United 1 Wrexham 2
53. It’s been hard for United to build possession since the sending-off.
Wrexham has received boos after some patient play in their own back third.
It’s Wrexham’s game to lose at this point.
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Manchester United 1 Wrexham 2
47. Daniel Gore has been called for a red card after a poor challenge.
United will be a man down the last 50 minutes.
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Manchester United 1 Wrexham 2
46. The second half has kicked off!
Manchester United has 45 minutes to equalize or take the lead.
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Pics from the first half
Here are some pictures from the first half of play.
Mullin’s injury is a devastating blow for WrexhamCredit: Getty 
Aaron Hayden scored the Red Dragons’ second of the nightCredit: AFP 
Manchester United got one back just seconds before halfCredit: Getty -
Halftime: Manchester United 1 Wrexham 2
United get one back just seconds before the half.
The big story though, surrounds Wrexham and Mullin’s injury.
It’s still unknown the severity of the injury or how long it could keep the star forward out.
Wrexham looked like the better side that half, netting two goals through the first 45 minutes.
Still a whole half left to play!
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Manchester United 0 Wrexham 2
45. There’s been five minutes of added time.
It’s been a fabulous 45 minutes for Wrexham to start.
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Manchester United 0 Wrexham 2
41. It was announced that Mullin was taken to a local hospital.
Mullin was down for over five minutes before walking under his own power.
Let’s hope the star forward has avoided serious injury for Wrexham.
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Manchester United 0 Wrexham 2
36. Wrexham won a long throw, and Aaron Hayden found himself on the receiving end.
After the ball bounced off a first player, Hayden leaped up and headed the Red Dragons’ second of the game into the back of the net.
What a start for Wrexham!
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Manchester United 0 Wrexham 1
34. United are on the prowl for the equalizer.
They’ve threatened Wrexham but failed to put a menacing shot on target.
Just over 10 minutes until the first-half whistle.
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Manchester United 0 Wrexham 1
29. Elliott Lee puts away the first for Wrexham!
It was some great buildup play on the right side of the pitch, which allowed for the cross to Lee.
Way to go Wrexham.
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GOALLLLL!!!! WREXHAM!!!!!!
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Manchester United 0 Wrexham 0
22. Mullin was subbed off for Billy Waters.
Wrexham had their first scoring chance of the night, putting a powerful shot on net.
The Welsh side has looked better the last few possessions.
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Manchester United 0 Wrexham 0
17. Mullin is up and walking.
Hopefully he’s avoided a major injury.
Unlucky for the forward.
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Manchester United 0 Wrexham 0
14. Mullin is still down.
The cart has come out and is on the field.
The star forward is surrounded by the medical staff.
The announcers believed it should’ve been a red card.
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Manchester United 0 Wrexham 0
11. Wrexham has a free kick on the edge of the United box.
Mullin got an over-the-top ball but was smacked by United’s goalkeeper, Bishop.
Mullin is still down on the ground.
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Manchester United 0 Wrexham 0
9. It’s been a great start for the English side.
United has just won a free kick outside the Red Dragons’ box.
It’s been all United so far.
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Manchester United 0 Wrexham 0
4. United has maintained possession early.
They haven’t been able to crack the Welsh back line but have gotten inside the box.
Nice start from the United youngsters.
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Manchester United 0 Wrexham 0
2. Manchester United are in stripes.
Wrexham are wearing reds.
The Welsh side had a quick fast break but it was sniffed out by the United defense.
Quiet start early.
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Kick-off: Manchester United 0 Wrexham 0
The game has kicked off!
Manchester United and Wrexham are underway.
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Wrexham Man United up next
Wrexham and Manchester United are just minutes away!
Kick-off from San Diego is up next.
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United take the pitch
Manchester United have taken the pitch.
Manchester United beat Arsenal 2-0 last gameCredit: Getty 
Erik ten Hag’s squad is looking for their fourth win in a rowCredit: Getty -
Wrexham recent form
Wrexham are coming off their first win of the summer friendlies, plowing through the LA Galaxy.
Although the Galaxy played their second unit, it was still a convincing effort by the Welsh club.
Wrexham hero and lead goal scorer Paul Mullin slotted in his first preseason tally in the dominant performance. Last season Mullin scored a ridiculous 38 goals in 46 appearances in the National League for the club.
In their first preseason game, The Red Dragons were shutout by a young Chelsea side.
Tonight, expect a crowd with a fair amount of Wrexham support against one of the most renowned English clubs of all time.