Silly Question

Lads,
What happens if a team has used all 3 subs, and then loses their keeper to a Red Card or injury? Has anyone ever seen it happen?
Thanking you in advance,
SeePee
What happens if a team has used all 3 subs, and then loses their keeper to a Red Card or injury? Has anyone ever seen it happen?
Thanking you in advance,
SeePee