Right before the final whistle, Garnacho worked the ball down the left before sending a cross to Joshua Zirkzee, whose shot deflected off a Chelsea defender and over the net, to groans from the Old Trafford crowd.
Both sides hit the woodwork in a back-and-forth first half of a game that will not go down as a classic. Chelsea’s Noni Madueke headed into the post from close range from Cole Palmer’s corner early in the game.
Marcus Rashford nearly scored in style in the last action before the halftime whistle when Fernandes chipped the ball over Chelsea defender Reece James but Rashford’s side-footed volley bounced off the crossbar.
There were some heated minutes of pushing and shoving after United defender Lisandro Martinez caught Palmer’s foot, although a VAR check decided it did not merit a red card.