C9 lost to TSM
Main reason why is they didnt change anything after they lost 2 games in a row. they picked kindred jungle 3 or 4 times and rush only found success on 1 of those games. graves was open the last game, gragas, and a few other champs couldve been much better mid game assets for teamfights and the mobility that graves or gragas have wouldve helped rush not get caught out 4 times every game. They picked too many scaling champs into the earlier power spike pressures that TSM chose like graves, maokai ect.