Erling Haaland's double helped Manchester City secure derby day delight as lifeless rivals Manchester United were outclassed in an embarrassing home defeat.
The eyes of the footballing world were on Old Trafford as the neighbours met in the 191st Manchester derby and first since Pep Guardiola's men matched their 1999 treble triumph.
Haaland scored a spot-kick and unmarked header before playing in Phil Foden to wrap up 3-0 victory, yet City's dominance was far greater than the scoreline suggests.
It was an abrupt end to an unconvincing three-match winning run in all competitions for Erik ten Hag's United, who have now lost five of their 10 opening Premier League games.