Chelsea staged a last-gasp comeback to beat Manchester United 4-3, with their top scorer Cole Palmer claiming a hat trick to turn a madcap match on its head after United seemed to have staged their own unlikely turnaround.

Boyhood Man United fan Palmer struck twice deep into time added on to save Chelsea, who were on the verge of a 3-2 home defeat. He completed his hat trick in the 11th minute of stoppage time with what was the latest winning goal in Premier League history.

- Stream on ESPN+: LaLiga, Bundesliga, NWSL more (U.S.)

Chelsea had raced into a 2-0 lead inside 20 minutes with a strike by captain Conor Gallagher and a Palmer penalty.

Goals by Alejandro Garnacho and Bruno Fernandes before half-time and another by Garnacho in the 67th minute turned the tide towards the visitors.

But Diogo Dalot's clumsy challenge on Noni Madueke earned Chelsea a second penalty, and Palmer converted in the 110th minute.

The drama wasn't over yet. A minute later, Palmer's effort from outside the box was deflected past André Onana to seal a spectacular comeback.

Information from Reuters and The Associated Press contributed to this report.