Only single games from now on.
If your intention is daily predictions, I recommend creating a publication system. For example: every time you make a new prediction, edit your post and add the date in the title. Also, in the body, list the previous and current matches, if you won, lost, or drew if that's the case, for a more reader-friendly thread.
Yea, the suggestion is okay if he can implement it and it will also be better understood by members who would want to go ahead is picking the selected game. The reason why some threads that features this same idea is not able to stand for a long time is because the OPs of similar threads doesn't properly construct the thread and doesn't care to update it from time to time. They usually lose interest along the line.