And we're back under way.

Nemanja Matic leads United back out for the second half.

The kids on the United bench are going to have to wait. No changes at half-time.

Kyle Utterson: Really good game Manchester United youngsters putting up a decent performance so far as are Young Boys. Very entertaining game could go either way brilliant equaliser.

Stuart Mitchell: Plenty of Man Utd players playing themselves out of the first XI. Been very sloppy should have been 2-3 up before that goal. Hopefully Rangnick gets the hairdryer out at half time.

Robin: Aaron Wan-Bissaka doesn’t look good at all. Can’t see him working out under Rangnick.

Time for Ralf Rangnick to send on Cristian....oh, hang on.

Jim McPhee: Barca have fallen so far. Here in California people are walking around in PSG shirts. Imagine that 10 years ago! No Barca shirts with Depay or Dembele on them. The Messi and Neymar Barca shirts must be at home in the closet... collecting dust!

Amrul Choudhury: Those horrific business deals for Dembele, Coutinho costing £250m+ really costing Barcelona dear... Testing time with youth...

As it stands....

Barcelona versus a team who finish second in the Europa League group stage in a play-off round for the right to get into the last 16.

How the mighty have fallen.

Manchester United have failed to keep a clean sheet in any of their last five Champions League group stage matches at Old Trafford, their longest run without a home shutout at this stage of the competition.

There are no changes in Group G as Lille, who still lead at Wolsburg, remain top by three points.

Red Bull Salzburg, currently drawing 0-0 with Sevilla, are in second.

It would be Sevilla who finish in third and drop into the Europa League play-offs if things stay as they are.

Thomas Muller has scored eight goals in seven appearances against Barcelona in the Champions League - his most against a single opponent in the competition.

That is the most goals anybody has scored against Barcelona in the history of the European Cup or Champions League.

Dion Dublin
Former Manchester United striker on BBC Radio 5 Live

United started off so comfortable, dominating play and creating chances but now they look a little bit ragged and all over the place.

It looks like a lack of communication to me.

Barcelona are heading into the Europa League knockout round play-offs as things stand.

Benfica still lead Dynamo Kyiv 2-0.

So Barca either need to score three goals, or for Dynamo to score three goals. Or they each score twice.

Having started so well, United are relieved to hear the half-time whistle.

Young Boys were so close to taking the lead on the stroke of half-time, Eric Bailly deflecting an attempt from an angle over the bar.

That was a decent half. Two lovely goals.

Image source, Getty Images

Bayern set a new Champions League record of scoring multiple goals in 12 consecutive home matches. They shared the previous record of 11 alongside Barcelona (2015-2017).

Marc-Andre ter Stegen should have done much better with that Leroy Sane goal.

Dion Dublin
Former Manchester United striker on BBC Radio 5 Live

That's Manchester United switching off out there.

It's a very good finish.

One goal isn't enough though, you can't not take your chances.

They've had enough to have seen it off by now.

@_MUFC_2021: Man United’s play after recovery of the ball needs an awful lot of work. Win possession deep in our own half and we look a little lost and struggle to get out.

The visitors are enjoying some decent possession as half-time looms. Another opportunity for Christopher Martins but it ends up in the Stretford End.

The last time Barcelona went out in the Champions League group stage was the year 2000.

They finished below Milan and Leeds that year.

The last time they were in the Uefa Cup/Europa League was 2003-04. Celtic knocked them out in the fourth round.