Casemiro came to Manchester United's rescue with an injury-time header to ensure the points were shared at Stamford Bridge after Jorginho looked to have given Chelsea a vital win.This is the most drawn fixture in Premier League history - failing to find a winner on 26 occasions - so it was no surprise when the Brazilian popped up with a late equaliser to ensure Erik ten Hag's side left west London with the draw they deserved.United had dominated po se sion during the first half but failed to make the most of their chances in the final third, with Chelsea goalkeeper Kepa Arrizabalaga making several fine stops.Chelsea came out firing in the second half after manager Graham Potter tinkered with his formation before the break, bringing on midfielder Mateo Kovacic for fullback Marc Cucurella. But it was one of Ten Hag's substitutions that almost decided the outcome of the match.Casemiro rescues a point for on the road. It's the fifth draw between Man United Antonio Williams Jersey and Chelsea in a row.Nothing to split the two sides... Sporting News Football Club (@sn_footballclub) Scott McTominay was introduced on 80 minutes and just four minutes later he clumsily wrestled Armando Broja to the floor in the box with his arms wrapped round the striker to gift Chelsea a penalty.Up stepped Jorginho to convert with ease and send the home crowd into a frenzy, only for Casemiro to have the last laugh in injury-time after Kepa narrowly failed to keep out his header.There was a worrying moment for United during the second half when defender Raphael Varane went down after stretching to make a clearance and had to be helped from the pitch in tears.A serious injury would make Varane a major doubt for France's World Cup campaign. Ten Hag said afterwards that the extent of the i sue was unclear but would be known within 24 hours.The Blues stay one point and one place above United in Dominique Funchess Jersey fourth, occupying the final Champions League spot in the Premier League table.MORE: 1H 2H Final Chelsea011Manchester United 011Goals: CHE - Jorginho (pen) - 87th minMUN - Casemiro - 90th min +4 Casemiro was already a contender for man of the match before his late heroics and bagging his first goal of the season eventually proved crucial to rescuing his side a vital point.Few would have tipped Casemiro to have the decisive moment in front of goal - let alone a header - but the talented midfielder took the game by the scruff of the neck to produce the moment of brilliance United were crying out for.Ten Hag would have been bracing himself for questions about when they needed something special in the final moments and he'll have Casemiro to thank for taking some of that heat off.These SCENES Manchester United (@ManUtd) There was talk of Fred's removal from the starting lineup in favour of Christian Eriksen being unfair after the Brazil midfielder's heroic display in United's 2-0 win at home Tottenham, and McTominay went no closer to silencing his critics by conceding a silly penalty.Casemiro, meanwhile, once again went about his busine s in midfield. Powerful and fearle s in breaking up play and bold with virtually every pa s played forwards, his was a complete performance.As for any criticism of Casemiro simply moving to Old Trafford from Real Madrid to take a big pay cheque, just take a look at the pa sion and emotion he showed in front of the travelling fans after delivering the goods. He absolutely loves it.Casemiro was all of us after his goal UtdDistrict (@UtdDistrict) It's now eight games unbeaten since Potter took charge and while he may still be experimenting with finding his best team and formation, rest a sured he's not afraid to be bold in making changes.The former Brighton bo s opted to hook Cucurella after 35 minutes. The Spaniard hadn' Chase Forrest Jersey t nece sarily put a foot wrong but Potter could see United's midfield were running the show and they needed Kovacic to combat that.United were on the front foot until then - and most certainly would have rued their chances had Casemiro not come to their rescue - but Kovacic's introduction put a halt to their midfield dominance.Thoughts from our head coach after . Chelsea FC (@ChelseaFC) Suddenly, Chelsea had extra legs, extra energy, Austin Katstra Jersey extra oomph in the middle to get a hold of the game. Kovacic forced the pa ses into Raheem Sterling and Pierre-Emerick Aubameyang to get them ticking.Plenty of managers would have held out until half-time to make the change. But with United knocking on the door at the time, Potter wasn't afraid to make the call to take off Cucurella and that bodes well for the future. FULL-TIME: Chelsea 1-1 Manchester United90th min +4: GOAL! Chelsea 1-1 Manchester UnitedCasemiro heads them level! He jumps highest in the box and Kepa gets a hand to his looping header but tips it onto the post and the ball comes back down, cro sing the goal line by a few centimetres! Casemiro's first goal for the club is a huge one.*Video available in UKWHAT A HEADER FROM CASEMIRO Manchester United have equalised Sky Sports Premier League (@SkySportsPL) LEVEL AT STAMFORD BRIDGE!A brilliant header by Casemiro evens the score! | NBC Sports Soccer (@NBCSportsSoccer) Casemiro SCORES!! 1-1 Chelsea FC vs Manchester United fuboTVCanada (@fuboTVCanada) 90th min +3: United Mark Barron Jersey aren't giving up yet. Elanga plays a dangerous ball into the box that evades everyone, then Dalot fires it back acro s.90th min +1: Jorginho takes one for the team by tripping up Elanga on the break and getting a yellow card.89th min: Shaw gets a yellow card for tripping Azpilicueta. Frustration beginning to show now. Chelsea are just a few minutes away from a vital three points. Six added minutes.87th min: GOAL! Chelsea 1-0 Manchester UnitedJorginho slots it past DeGea to the right as the Spaniard gue ses the wrong way.JORGINHOOOO Chelsea take the lead in the final few minutes Sky Sports Premier League (@SkySportsPL) JORGINHO BURIES THE PENALTY FOR THE LEAD! | NBC Sports Soccer (@NBCSportsSoccer) GOALLLLLLLLLLLLLL!!!!Chelsea 1-0 Man UnitedJorginho = fuboTVCanada (@fuboTVCanada) 84th min: Penalty to Chelsea! McTominay is all over Broja and brings him to the floor. Very clumsy from the sub. Fred gets a booking for protesting after.83rd min: Some patient build up play from United comes to an end when Elanga plays a sloppy pa s. At the other end, Chelsea win a corner.80th min: Ten Hag rolls the dice too, Eriksen and Rashford are replaced by McTominay and Elanga. If only they had Ronaldo available to bring on for that last minute winner...79th min: Mor