Casemiro's goal was his first for United since joining in the summerCasemiro's looping stoppage-time header gave Manchester United a deserved point in a dramatic finale against Chelsea at Stamford Bridge.
Jorginho's late penalty looked to have given Chelsea a narrow win when he sent goalkeeper David de Gea the wrong way from the spot after substitutes Scott McTominay and Armando Broja tangled at a corner three minutes from time.
Defeat would have been harsh on United but they got the reward their performance merited when Casemiro rose to meet Luke Shaw's cross deep into six minutes of stoppage time, Chelsea keeper Kepa Arrizabalaga getting a fingertip touch but unable to stop the ball crossing the line as it bounced back off the inside of the post.
United, with Cristiano Ronaldo left out of the squad as a disciplinary measure following his refusal to come on as a substitute in the win against Tottenham, had the better chances as they dominated the first half.
Erik ten Hag's side were well on top and far more dangerous, Kepa saving well from Marcus Rashford and Antony, the latter also missing a great chance when clean through.
The second half was closer and concluded with that frantic finish, but the main worry for United now is an injury to defender Raphael Varane, who left the pitch in tears as he clearly fears for his World Cup chances with France.
Disappointment for Chelsea & Potter
Chelsea manager Graham Potter must have thought he was on the way to his second victory over United this season after Jorginho calmly slotted home late on.
Potter, who won at Old Trafford with Brighton on the opening weekend, was also set to see his side earn a sixth successive clean sheet in all competitions until that late Casemiro intervention.
In reality, however, Chelsea would have been fortunate to win. Indeed, so outmanoeuvred were they in the first half that Potter was forced into a tactical reshuffle to bolster his struggling midfield after only 36 minutes, Mateo Kovacic coming on for Marc Cucurella.
Chelsea were grateful to goalkeeper Kepa in that period but they improved after the break - albeit they were still unable to force De Gea into any serious work, the one anxious moment for the visitors coming when Trevoh Chalobah's header glanced off the top of the bar.
The hosts ultimately could muster just two shots on target in a game that failed to live up to its billing - but there will be real disappointment that they could not close out the win after taking the lead so late.
Potter was at least able to maintain his unbeaten record as Chelsea manager but it could have been so much more satisfying.
Man Utd boss Ten Hag can be satisfied
Ten Hag will be happy with a point after coming close to leaving with nothing. When the dust settles, however, he will know this was a missed opportunity.
Rashford and Antony should each have done better when clean through and it looked like they would pay for their profligacy before the outstanding Casemiro's first goal for the club provided the sting in the tail.
Ten Hag would have been bitterly frustrated at McTominay's rash tangle with Broja to concede the penalty and it was no surprise that the Scotland midfielder embraced Casemiro in sheer relief at the end.
United's manager has brought clear improvements to the team, who now press more effectively and play with more intensity.
He has also dealt firmly and strongly with Ronaldo's insubordination, leaving him out of the squad here to deliver a clear message clear that there will only be one man making the decisions at Old Trafford.
However, United will worry about Varane, who collapsed with what looked like a muscle injury as he went to challenge Pierre-Emerick Aubameyang.
The defender's tearful reaction clearly suggests it is a problem that threatens his World Cup chances.
More to follow.
Player of the match
CasemiroCasemiro
Chelsea
Squad number1Player nameArrizabalaga
Squad number14Player nameChalobah
Squad number6Player nameThiago Silva
Squad number8Player nameKovacic
Squad number19Player nameMount
Squad number5Player nameJorginho
Squad number21Player nameChilwell
Squad number28Player nameAzpilicueta
Squad number12Player nameLoftus-Cheek
Squad number18Player nameBroja
Squad number10Player namePulisic
Squad number30Player nameChukwuemeka
Squad number32Player nameCucurella
Squad number17Player nameSterling
Squad number9Player nameAubameyang
Line-ups
Chelsea
Formation 3-4-2-1
1Arrizabalaga
14Chalobah6Thiago Silva32Cucurella
28Azpilicueta5Jorginho12Loftus-Cheek21Chilwell
19Mount17Sterling
9Aubameyang
1Arrizabalaga14Chalobah6Thiago Silva32CucurellaSubstituted forKovacicat 36'minutes28Azpilicueta5JorginhoBooked at 90mins12Loftus-CheekSubstituted forChukwuemekaat 79'minutes21Chilwell19Mount17SterlingSubstituted forBrojaat 79'minutes9AubameyangSubstituted forPulisicat 74'minutesSubstitutes
8Kovacic10Pulisic16Mendy18Broja20Zakaria22Ziyech23Gallagher29Havertz30ChukwuemekaMan Utd
Formation 4-2-3-1
1de Gea
20Dalot19Varane6Martínez23Shaw
18Casemiro14Eriksen
21dos Santos8Bruno Fernandes25Sancho
10Rashford
1de Gea20Dalot19VaraneSubstituted forLindelöfat 60'minutes6MartínezBooked at 90mins23ShawBooked at 90mins18Casemiro14EriksenSubstituted forMcTominayat 80'minutes21dos SantosBooked at 32mins8Bruno Fernandes25SanchoSubstituted forFredat 52'minutesBooked at 86mins10RashfordSubstituted forElangaat 81'minutesSubstitutes
2Lindelöf12Malacia17Fred22Heaton28Pellistri36Elanga39McTominay49Garnacho55IqbalLive Text
Match ends, Chelsea 1, Manchester United 1.
Second Half ends, Chelsea 1, Manchester United 1.
Offside, Chelsea. Christian Pulisic tries a through ball, but Armando Broja is caught offside.
Lisandro Martínez (Manchester United) is shown the yellow card for excessive celebration.
Goal! Chelsea 1, Manchester United 1. Casemiro (Manchester United) header from the centre of the box to the bottom left corner. Assisted by Luke Shaw with a cross.
Jorginho (Chelsea) is shown the yellow card for a bad foul.
Anthony Elanga (Manchester United) wins a free kick on the left wing.
Foul by Jorginho (Chelsea).
Anthony Elanga (Manchester United) wins a free kick in the defensive half.
Foul by Mason Mount (Chelsea).
Foul by Lisandro Martínez (Manchester United).
Christian Pulisic (Chelsea) wins a free kick on the right wing.
Luke Shaw (Manchester United) is shown the yellow card for a bad foul.
Attempt missed. Scott McTominay (Manchester United) header from the centre of the box misses to the left. Assisted by Diogo Dalot with a cross.
Goal! Chelsea 1, Manchester United 0. Jorginho (Chelsea) converts the penalty with a right footed shot to the bottom right corner.
Fred (Manchester United) is shown the yellow card.
Penalty conceded by Scott McTominay (Manchester United) after a foul in the penalty area.
Penalty Chelsea. Armando Broja draws a foul in the penalty area.
Corner, Chelsea. Conceded by Luke Shaw.
Substitution, Manchester United. Anthony Elanga replaces Marcus Rashford.
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