I agree with Tijny that it should have two rounds (6 matches) because with one round there's only two possibilities for the outcome (if draws can't happen):
Scenario 1 (One wins all scenario):
Player 1: 9 points
Player 2: 3 points
Player 3: 3 points
Player 4: 3 points
Scenario 2 (One loses all scenario):
Player 1: 6 points
Player 2: 6 points
Player 3: 6 points
Player 4: 0 points
Any other distribution of points is impossible and thus the 2nd place would always be decided by goal difference, which is a bit bad. With 2 rounds there would be a lot more possibilities, so that should solve the problem. I would definitely join this kind of competition because it could generate a lot of drama because of constantly changing teammates and individual rivalry.




