Yes, yes, and if the saves aren't provided, then ban everyone...
According to the rules:
5. Saves from all games must be kept until the end of the tournament and presented upon first request from the tournament organizers or any member of the Arbitration Committee (AK).
It's true that it doesn't say what to do if there are no saves, but
If a situation is not regulated by the rules, the judges are guided by elementary logic and gaming ethics.
Elementary logic in the absence of game saves is to annul the result. But I understand that for the AK to consider this situation, someone needs to appeal to the AK. I personally am not interested, but after the ninth round, there may well be those who want to.