I spotted Manchester United star's reaction vs Chelsea - it highlighted a problem for Ruben Amorim

Manchester United drew 1-1 with Chelsea at Old Trafford on Sunday afternoon.

Ruud van Nistelrooy secured a dominant 5-2 victory over Leicester City in his first game as interim boss earlier in the week and the Dutchman was present on the touchline again.

The appointment of Ruben Amorim from Sporting Lisbon was confirmed on Friday and his first match as United head coach will come against Ipswich Town on November 24.

Amorim will watch United from Portugal until he arrives and there were positives and negatives to take from Sunday's draw, with the points being shared between the two sides.

ALSO READ: United player ratings from Chelsea fixture

ALSO READ: United vs Chelsea as it happened

Here are the moments you might have missed from the game...

Casemiro couldn't watch

Rasmus Hojlund won the penalty that Bruno Fernandes converted to open the scoring against Chelsea and Casemiro chose to stand on the halfway line and look away from the action.

Casemiro was crouched on the halfway line and looking at Andre Onana, who was facing the action, when the penalty was taken and they shared a warm embrace when it was converted.

Whether Casemiro chose not to watch the penalty out of superstition or was simply too nervous to watch is up for debate. Either could be true because United have been so wasteful this season and it wouldn't have been a surprise if Fernandes had missed from the spot.

United lacked quality in the final third against Chelsea and their performance was summed up by Alejandro Garnacho and Fernandes ballooning late chances into the Stretford End.

Only Crystal Palace and Southampton have scored fewer goals in the Premier League than United this term and Amorim must address the team's problems in front of goal.

The set-piece coach

It seemed bizarre that Van Nistelrooy had to turn and instruct set-piece coach Andreas Georgson to come down to the touchline when Chelsea had their first corner of the game.

Georgson was appointed to the backroom staff in the summer to take charge of United's set-piece planning, but Van Nistelrooy had to encourage him to leave the bench.

Most Premier League teams have set-piece coaches and they tend to rush down to the touchline when a corner or free-kick is being taken. Georgson's first appearance on the touchline was around 11 minutes in and he stood helpless as Chelsea smashed the post.

Noni Madueke was unmarked in the box and the winger might have scored if he hadn't been clattered by his teammate. After that corner, Georgson appeared on the touchline whenever a set-piece was awarded.

Van Nistelrooy's message

It didn't take long to recognise United were losing the midfield battle against Chelsea. Casemiro and Manuel Ugarte delivered strong performances against Leicester earlier in the week but they were both off the pace against Chelsea and the glaring space in midfield returned.

The South American pair struggled in the first half and their passing was wayward and sloppy, with Van Nistelrooy feeling the need to offer some words of advice after 20 minutes.

When Chelsea had a goal kick and there was a moment to pass on instructions, Van Nistelrooy shouted at Casemiro and Ugarte and told them to tighten up by gesturing with his hands.

Van Nistelrooy said United were 'light in midfield' in his pre-match press conference and he'll be hoping that Kobbie Mainoo is available before his final game in charge.

Country roads

There was a belting rendition of 'Take Me Home' before kick-off. The song was introduced for this season and is played following 'This Is The One' when the players walk out.

"To Old Trafford, to see Unitedddddd, take me home, United road," was aired as the players embraced in a huddle and it was the loudest rendition of the song so far this season.

That is because Erik ten Hag has been sacked and there is renewed optimism at Old Trafford.

The warm-up is worth watching

If you have a season ticket at Old Trafford or get the chance to attend the occasional fixture, it's worth keeping an eye on the pre-match warm-up as it can often hint at the team's tactics.

United practice crosses as part of their pre-game routine and Diogo Dalot will play crosses in from the fight flank if he's been selected to start at right-back. That's exactly what happened ahead of Chelsea and Noussair Mazraoui was on the other side, which indicated he'd start at left-back.

Former United manager Erik ten Hag started the new campaign with Dalot on the left side of defence but the 25-year-old struggled on that side and was recently relocated.

Watching the warm-up might sound mundane but it can be worth it.