Claudio Bravo picked up the injury in Monday’s training session and underwent scans in the afternoon.
Bravo was reported by numerous media sources to have suffered the injury on Monday, with the player himself posting a tweet which alluded to coming back from adversity.
“No matter what happens, or how bad it looks today, life will go on, and tomorrow will certainly be better,” wrote the 35-year-old.
On Monday night, the Premier League champions revealed that scans on Bravo “confirmed a rupture in the tendon of his left foot”.
City also announced that the Chilean “will fly out to Barcelona for further tests on Thursday where the extent of the injury will be examined”.
Bravo’s injury leaves City reliant on 20-year-old Daniel Grimshaw to act as deputy to first-choice Ederson.
While Grimshaw is yet to make a single senior appearance, he signed a three-year contract at the club in June.