For a coach that normally has such a settled squad, Pep Guardiola could be set to play his fifth goalkeeper in little over three years at Manchester City after recalling Montenegro under-21 international Aro Muric from a season-long loan.
Claudio Bravo is potentially facing six months out after rupturing his Achilles' tendon, leaving City with only Ederson as a keeper with any first-team experience.
Here's how the situation has unfolded over a busy few weeks...
Past
Remarkably, City went into the summer with four international keepers on their books. Ederson is the undoubted No.1 after an impressive debut season following his £35 million move from Benfica.