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Walsall are 11th in League Two, while Leicester sit 14th in Premier League
Walsall's best FA Cup runs have seen them reach round five, last in 2002–03
Leicester won the competition for the first time in 2021
Man Utd 3-1 Reading
Leon Osman
Former Everton midfielder on BBC Radio 5 Live
Poor defending from United and Reading take advantage of that. Amadou Salif Mbengue attacks it beautifully. Reading are looking good at the moment
Man Utd 3-1 Reading
No Casemiro hat-trick tonight. He's replaced by Kobbie Mainoo. Wout Weghorst comes off for Anthony Elanga.
Man Utd 3-1 Reading
Anon isn't getting carried away there at all...
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Matt: That was a cheeky finish by Fred. Some Brazilian magic on show at Old Trafford tonight.
Anon: Casemiro signing is becoming even better than Cantona from Leeds
Amadou Salif Mbengue
Could they?!
I don't think I even told you that Amadou Salif Mbengue came on a couple of minutes ago. Well he's powered in a header from Tom Ince's corner.
Man Utd 3-0 Reading
Leon Osman
Former Everton midfielder on BBC Radio 5 Live
Rashford is disappointed to being taken off. Hands in the air.
Wanted to break that record tonight. Don't blame him. Something that's not been done since 1959.
You have to go for it.
Man Utd 3-0 Reading
It's just a matter of how many United will score now. Alejandro Garnacho cuts in and has a shot saved by Joe Lumley. Wout Weghorst is inches away from turning the rebound in and then Fred drives over.
Man Utd 3-0 Reading
Leon Osman
Former Everton midfielder on BBC Radio 5 Live
Clever from Fred. Sharp. A lot of speed and caught Reading out. Back heel in. Great.
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Willem: Looks like a smooth win for United. Before Ten Hag they would have struggled in a match like this.
Alex: That is up there with one of the stupidest things I've seen on a football pitch from Andy Carroll.
Man Utd 3-0 Reading
Marcus Rashford's chance of becoming the first United player to score in 10 consecutive home games is over.
He and Bruno Fernandes are replaced by youngsters Alejandro Garnacho and Facundo Pellistri.
Leon Osman
Former Everton midfielder on BBC Radio 5 Live
Carroll is walking off the pitch and shaking his head but don't know why he is complaining.
He was a yellow card. You have to be careful but he couldn't stop himself.
Man Utd 3-0 Reading
There is a VAR check - Fred was close to being offside - but the goal stands.
Fred
We can pack up now, this game is done.
United play a short corner and Fred flicks in at the near post from Bruno Fernandes' cross.
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Nick: Has ever a player become a cult hero as quickly as Casemiro? What a guy, what a player.
Nathan: No-one appreciated just how good Casemiro was because he had Kroos and Modric next to him. Absolutely world class.
Man Utd 2-0 Reading
Reading striker Andy Carroll is sent off for a second booking.
This one is for a terribly late challenge on Casemiro. He could have had two red cards tonight. Ridiculous showing.
Man Utd 2-0 Reading
Reading are going to have to really do something dramatic to come back into this game. They've only had one proper chance.
Man Utd 2-0 Reading
Leon Osman
Former Everton midfielder on BBC Radio 5 Live
What a player Casemiro is. What an influence he has on this team. He doesn't just sit there. When the game is tight, he spots it and goes in to try and get the ball.
Man Utd 2-0 Reading
Reading bring on midfielder Tyrese Fornah, who is on loan from Nottingham Forest. Mamadou Loum comes off.
Man Utd 2-0 Reading
Tyrell Malacia shoots over now for United.
Man Utd 2-0 Reading
Leon Osman
Former Everton midfielder on BBC Radio 5 Live
Casmiro seemed encouraged by the fans to try and have a shot on goal.
Don't think anyone was expecting that to go in.
The dominance of United carries on in the second half.