On the 16th minute, John Stones had possession of the ball on the edge of his own defensive third. He attracted attention from Jurgen Klopp's attackers and passed the ball backwards to Zack Steffen, who was playing in place of Ederson.
Unlike the Brazilian goalkeeper, Steffen isn't completely at ease with the ball at his feet. The American – who is now on loan at Middlesbrough – controlled Stones' pass but took too long to release possession, allowing Sadio Mane to tackle him while scoring a goal in the process.
It was an unfortunate moment for Pep Guardiola's men, but one which truly captured the value of Ederson when it comes to building moves from the back and through the thirds of the pitch.
This weekend, City will face Liverpool for the first time since that match in April, and the roles could reverse this time around.
Klopp's first-choice option between the sticks – Alisson Becker – is injured at the moment, and he will miss the Charity Shield contest on Saturday afternoon. His support act, Caoimhin Kelleher, will also be absent due to injury.
As a consequence, Adrian looks destined to start for the Reds. The Spaniard is not as accustomed to starting passing moves from the back as Alisson or Kelleher, and City could use that disadvantage, just as Liverpool did in last year's FA Cup clash.
On a number of occasions during his time at Anfield, Adrian has shown to be hesitant and indecisive in certain moments, especially when under pressure. Pressing Alisson doesn't always make sense, but doing so against a third-choice option could bear fruit.
Now 35 years old, he isn't as mobile as he once was, meaning his ability to operate as a sweeper keeper isn't particularly strong either. Guardiola could encourage through balls from his players on a regular basis for that exact reason, with Erling Haaland likely to benefit.
If Liverpool attempt to perform in the same manner as usual despite their change in goalkeeper – by playing with a high defensive line and building moves from the back – they could end up suffering just as City did at Wembley.