Manchester United away fans streamed out of the Etihad before half-time after another nightmare 45 minutes.

But ex-manager Sir Alex Ferguson had to sit and watch the collapse with a face of thunder.

Pep Guardiola's side dismantled United with FOUR goals in a brutal opening half in the derby.

Erling Haaland and Phil Foden grabbed two goals each as they tore the United defence apart.

The Sky Sports cameras cut to ex-United boss Ferguson slumped in the stands looking seriously fed up with events on the pitch.

"They've seen enough..." pic.twitter.com/mA0eO5RzV7

— Sky Sports Premier League (@SkySportsPL) October 2, 2022