Manchester United's last game against Chelsea saw them break an unwanted Premier League record when Cole Palmer took center stage.
The Red Devils were 2-0 down after just 19 minutes of play at Stamford Bridge, but quickly equalized before half-time.
Alejandro Garnacho scored midway through the second half to put United ahead and direct them towards the three points.
However, two minutes of added time madness saw them collapse and leave west London with nothing to show for their efforts.
Diogo Dalot fouled Noni Madueke inside the area and palmer He was the man who scored from 12 meters in the tenth minute of added time.
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Chelsea It didn't stop there: on a breakaway play, Carney Chukwuemeka's shot deflected back for a last-gasp corner.
Enzo Fernández surprised the United defense and passed the ball to Palmer, who fired past Scott McTominay to score the dramatic winner.
His goal was scored in the 11th minute of added time and sent the Chelsea fans into a frenzy who achieved an exciting comeback.
United's capitulation is the latest collapse in Premier League history as they led for 99 minutes and 17 seconds and failed to win.
Sheffield United previously held the record after conceding in the eighth and tenth minutes of added time against Tottenham earlier in the season.
Palmer, the former Manchester City star who later admitted he supported United as a child, also made history that night.
His winning goal is the last scored in the Premier League and one that has turned Chelsea's 4-3 victory into an all-time classic.
It also completed the 22-year-old's hat-trick, the first of three he has scored for Les Bleus since his arrival in the summer of 2023.
Seven months after their entertaining clash, United host Chelsea at Old Trafford on Sunday in one of the biggest Premier League games of the weekend.
Interim coach Ruud van Nistelrooy, who was appointed following the dismissal of Ten Hag, will be tasked with sealing the hosts' fourth league win of the season.
United await the arrival of Sporting Lisbon coach Rubén Amorim as their next managerand his debut will occur after the international break in November.
Chelsea have not won at Old Trafford since 2013, but will go into the game six points ahead of their rival.
Enzo Maresca's side were beaten 2-0 by Newcastle in the Carabao Cup on Wednesday, but defeated them in the Premier League three days earlier.
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