Watch: Gianluigi Donnarumma’s incredible last-gasp save to deny Bryan Mbeumo and seal Man City derby win

The dramatic victory also underlined the impressive start Enzo Maresca has made since taking charge of Manchester City following Pep Guardiola’s legendary tenure.

Maresca was visibly delighted at the final whistle, running down the touchline after watching his side withstand enormous pressure at Old Trafford.

Managing a team down to 10 men in a Manchester derby is one of the biggest tests imaginable, but City showed the defensive organisation and resilience required to see out the victory.

The result keeps Manchester City’s perfect Premier League start intact, with Maresca’s side remaining level at the top of the table alongside defending champions Arsenal.

For Donnarumma, however, the final word belonged to his remarkable save that denied Mbeumo and secured all three points.