Do you have a data feed to pull from, or some kind of list of matches? It shouldn't be too hard to use a simple python script to parse a file and post automatically on a schedule. I maintain a repo that doesn't exactly match your use case, but I could maybe add your functionality depending on complexity
Well the thing about a tournament is that of course we cant know the team pairings of quarterfinals etc until the games before have been played. So we would need a source that updates itself with that info