Ahmed had only been on the pitch a matter of minutes, following his post-World Cup return, but appeared to twist his left leg in the turf and immediately dropped to the pitch, clutching his left knee.
The Canadian international was able to hobble off, supported by two members of City’s medical and physio staff, and will now be assessed fully in the coming days.
Clement gave his reaction to the fresh injury setback, plus updates on the futures of Jakov Medic and Amankwah Forson, along with a positive bulletin on City’s transfer search.
The Canaries are in the market for a left-back ahead of the Championship kick-off against West Brom later this month.
The City chief also provided a fitness update on Pelle Mattsson, who was missing against the Spanish after an injection for a hip-related issue.
The Belgian spoke to the local media at Carrow Road on Saturday afternoon.