Pep Guardiola has suffered another early season blow to his squad with the club announcing on Tuesday that Claudio Bravo suffered an injury to his Achilles tendon during training.
No timescale has yet been put on this injury by the club as the Chilean travels to Barcelona this week to undergo further tests.
This now leaves City in a bit of a dilemma as the club now have no experienced third choice keeper at the club.
20 year-old Daniel Grimshaw is the only other keeper in the first team squad, but is yet to make a first team appearance with the Blues.
City recently sold Joe Hart to Burnley and also Angus Gunn to Southampton and could now look to find a viable replacement in the shape of a free agent.
The difficulty for City is that the goalkeeper represents such a vital role in the way the team plays and one injury to Ederson could provide a serious problem on all fronts. Similar to last season, Bravo would have been utilised in the domestic cup games and it may be too much of a risk to trial Grimshaw in games of this magnitude.
In recent days, City have agreed a deal to sign 16 year-old Irish goalkeeper Gavin Bazunu from Shamrock Rovers in a deal worth €400,000. The keeper will make his move from Dublin to Manchester at the start of next season to begin his four-year deal.