Ederson fanned the flames after Manchester City's derby win by claiming Jose Mourinho's side could have found themselves on the end of a hiding.
Manchester United are now 12 points behind the Premier League champions after Sunday's 3-1 defeat, with the City goalkeeper adamant they had more goals in them.
Ederson believes City have improved further since last year's record-breaking campaign and claimed they could have embarrassed United.
'We were way better than United,' Ederson said. 'If we had pushed more we could have got a larger result.'
The 25-year-old also warned City's title rivals that there is more to come as they target a mountain of trophies.
'Absolutely,' the goalkeeper said when asked if they are better this term. 'Pep's in his third season here, it's my second and I can see the team has a deeper understanding of his ideas.
'If we keep going like this, we can achieve a lot in the future.'
Ilkay Gundogan's 86th-minute goal put the game to bed after Anthony Martial's penalty had offered United a route back into it.
Ederson felled Romelu Lukaku after rushing out, a similar error to the one he committed against Southampton last week.
The Brazil international is not worried about the two mistakes. 'I tried to retract my hands but had no time to do that,' he added.
'There was contact between us but I don't know if it was enough for a penalty. It's a quick decision in a moment of the game. I tried to hit the ball, it happens.
'When a goalkeeper makes a mistake, there is no one to save the goal. A striker can miss three or four chances and still score the fifth. It's different for a goalkeeper.'