Image source, Getty Images

Heidenheim manager Frank Schmidt had a beaming smile on his face after Sirlord Conteh nestled the ball in the net.

Schmidt is Heidenheim through and through. He was born in the town, played for the club and has been manager since 2007.

He led them to the Bundesliga for the first time in their history for the 2023-24 and delivered European football.

Schmidt is also the longest-serving manager of any German professional football club.

Gustavo Sangare goes into the referee's book for a foul on Joao Felix.

Izzy Christiansen
Former England midfielder on BBC Radio 5 Live

The referee seems sure, he had an excellent view. I have seen those given.

Huge penalty shout. Alejandro Garnacho dances into the middle and then goes down in the box right as he's about to shoot.

Was he tripped? Replays show the Argentinian caught a defender as he attempted his strike, not the other way around.

Christopher Nkunku hasn't managed to find a goal in this game so far and he'll be desperate for one.

He drives forward and lets fly from the left but his effort skims the bar and flies over.

Image source, Getty Images

Gustavo Sangare loops one over but there's too much on it and Filip Jorgensen collects.

Chelsea all but home dry here but they'll not want to concede.

Izzy Christiansen
Former England midfielder on BBC Radio 5 Live

That combination from Bruno Fernandes and Amad Diallo on this right-hand-side has been lightening at times.

Bruno releases him into a goal scoring position, the vision to see that run in-behind is second to none.

Classic counter. Bruno Fernandes flicks the ball over the top and Amad Diallo drives towards goal, but he's kept out by onrushing PAOK keeper Dominik Kotarski.

Big save to keep it at 1-0.

Manchester United hunt for a second. Alejandro Garnacho tees up Diogo Dalot, but the full-back chips his effort into row z.

Yan Dhanda tries to thread it through to Lawrence Shankland and it rolls away for a goal kick.

Hearts boss Neil Critchley likes what he is seeing and applauds the effort.

It has been some season for Critchley. Sacked by League One Blackpool after losing the opening two games of the campaign and now managing a team in Europe.

Robin: Not playing Amad week in and week out was one of Ten Hag's biggest mistakes.

Image source, Getty Images

Ah. Cheap yellow for Manuel Ugarte as he breaks up an attack by dragging a PAOK player to the floor.

The free-kick is straight at Andre Onana and then PAOK's Tarik Tissoudali gets a yellow for blocking the United stopper as he tries to distribute the ball.

Joao Felix almost has hat-trick as Chelsea pass it around in tight spaces in the box and it comes to the Portugal forward but his low shot doesn't have enough power on it and Ognjen Cancarevic makes the save.

That was Amad Diallo's first goal in Europe since his header against AC Milan in 2021.

Marcus Rashford and Lisandro Martinez are warming up for the hosts.

Chadrac Akolo goes close with a free-kick which is pushed away by Rohan Ferguson.

That is as close as St Gallen have come in the early stages of this second half.

Simon Stone
BBC Sport's chief football news reporter at Old Trafford

Image source, Getty Images

Amad deserves that.

He is the Manchester United players who threatens the PAOK defence.

He is not scared to run at them and isn't put off, even when something doesn't quite work.

I am not sure PAOK keeper Dominik Kotarski read the flight of that header. It was arcing towards the far corner as soon as it left Amad's head but Kotarski just stood and watched it.

So, Manchester United have gone in front in seven of their past eight games in Europe, but have only won one of them.

Will they finally, finally see a game out?

Almost an instant response. Andrija Zivkovic beats Diogo Dalot to the ball but hammers a shot off target.

Izzy Christiansen
Former England midfielder on BBC Radio 5 Live

Image source, Getty Images

What a header that is at the back post area.

Bruno Fernandes lifting the ball into a beautiful area and Amad Diallo's header is pinpoint. A superb player, the best player on the pitch tonight.