Guardiola was widely vilified when he arrived at the Etihad and almost instantly dismissed Joe Hart from the first-team picture, eventually loaning him to Torino of Italy for the 2016/17 season.
Claudio Bravo, the Barcelona keeper, was signed as Citys new no.1, and after showing some early promise he became perhaps the biggest laughing stock during a campaign which saw Guardiolas side finish in third – a full 15 points behind Premier League winners Chelsea.
Bravo has been one of the few signings made since Guardiolas arrival who has not lived up to expectations, but rather than putting his tail between his legs and accept the return of Hart as his no.1, Guardiola sent the England keeper away, again, and raided the transfer market for a new glovesman, again.
Ederson was brought to the Etihad for a world record £35m fee last summer, and his ability to play out from the back has been a central theme of Citys brilliant play this season, which has secured them the Premier League title with five games to spare.
And it is easy to see just how Ederson, a nominee for the Young Player of the Year shortlist, has had an impact in Guardiolas possession-based game, by comparing his stats with those put in by Hart in 2015/16 and Bravo in 2016/17.
Though few would suggest Ederson is as good as David de Gea, the Manchester United star, when it comes to pure goalkeeping ability, there is no doubt he remains a class shot stopper who does not let his skills with the ball at his feet cover up issues when an opponent is trying to beat him and score.
There are various factors which explain Manchester Citys romping title success of 2017/18 – their brilliant squad, Guardiolas coaching, the incredible money spent, poor performances from their rivals – but one which cannot be dismissed is the scouting and signing of Ederson, perhaps the most important player in Citys first XI despite his frequent appearances on the fringes of the action.