Chris Waddle
BBC Radio 5 live at Old Trafford

"Billy Sharp is not happy at coming off. He's been totally isolated today."

Ryan Flynn comes on for Billy Sharp who is absolutely fuming. Shakes his head, claps the fans and aggressively shakes the hand of his manager. Not happy one bit.

Did Juan Mata deserve the hook?

Image source, .

A lot of work down the right but nothing telling. In all he played 44 passes, with 86% finding a Manchester United player.

Our stats from Opta say that of his five crosses, none of them were good.

It's been a long day of FA Cup action to be fair...

Chris Waddle
BBC Radio 5 live at Old Trafford

"There's a few Man Utd players you could take off, there's no doubt about that."

Image source, Reuters

Ander Herrera is making way for Jesse Lingaard and Juan Mata is coming off for Memphis Depay.

I'll take a look at how they shape up. Lots of high-fives on the bench for Mata.

We are going to get some Manchester United changes imminently. At this rate, it's the kind of action which will make the top paragraph of a match report.

Earlier I described Nigel Adkins as a man of positivity and he is not disappointing. Up out of his dugout he's hollering and clapping like a child at Sea World.

Juan Mata concedes possession carelessly in midfield and Billy Sharp is sent clear. He has to hold things up and Paul Coutts cannot keep the move flowing down the right, almost forcing a corner.

Chris Waddle
BBC Radio 5 live at Old Trafford

"By sitting deep and not coming across the halfway line much, Sheffield United are basically saying to the hosts, 'Come and beat us.'

"At the moment it really doesn't seem like Man Utd are going to do that."

Juan Mata whips one in, he's seeing a lot of the ball now but it's headed clear by David Edgar.

Edgar has been very, very good so far. Headed it a lot, been strong in duels, he's setting the tone in that back line.

Alan Green
BBC Radio 5 live at Old Trafford

"If anything Man Utd are worse than they were in the first half - at least then they were finding colleagues with their passes.

"No risks and no decent passing at the minute."

Ander Herrera has played 40 passes, 32 have been complete. But how many have been forward? A lot of sideways, backwards stuff.

Image source, .

Alan Green
BBC Radio 5 live at Old Trafford

"Small mercies here at Old Trafford - the rain has stopped.

"Looking round though there are lots of fans who still haven't come back to their seats for the second half."

Daley Blind, to Anthony Martial, down the Manchester United left. The play is switched to Juan Mata who will cross and it's held by George Long.

If you're a Manchester United fan - it has to get better. If you're a Sheffield United fan - pray that it won't.We're on again. The floodlights beam down. So far they've lit up a very ordinary home display.

Chris Waddle
BBC Radio 5 live at Old Trafford

"They might need Memphis Depay or even Jesse Lingard to come on and give this Man Utd side a bit of width.

"I know Memphis is frustrating but he takes people on and would give them width.

"At this rate Man Utd are going to end up with Marouane Fellaine up front and just lumping the ball towards him - it's the only way they're going to break Sheff Utd down."

Image source, Getty Images

Daniel de Wijze: #bbcfacup Sat in the Sir Alex Ferguson stand, wishing the man himself could come back and get rid of this tired, boring, useless Man Utd side!

Andy McNamara: I'm watching Peppa Pig right now, it seems less predictable than a Man Utd home game. #bbcfacup.

Barnaby Thompson: I've watched an awful lot of paint dry so far this season... #BBCFACup #MUFC.