The Egyptian FA statement said: "Dr Mohamed Abou El-Ela, the doctor of Egypt’s national football team, confirmed that Omar Marmoush sustained a knee ligament bruise during today’s match against Burkina Faso in the eighth round of the 2026 World Cup qualifiers. The player will undergo scans upon his arrival in Cairo on Wednesday morning."
Later on Wednesday, City issued their own update: "Manchester City FC can confirm that Omar Marmoush has sustained a knee injury whilst on international duty with Egypt. The City striker suffered the injury in the early stages of Egypt’s World Cup qualifying match with Burkina Faso on Tuesday evening. Initial results on a scan performed in Egypt indicate he will not be available for the Manchester derby on Sunday, and he will now return to Manchester for more assessment and to begin his rehabilitation. Everyone at City wishes Omar a speedy recovery."