5 points is awarded for:
4 points for a win
1 "bonus" point for scoring 4 tries (or more)
This can be made easier by maxing out all the Speed & Acceleration stats of your chosen team and reducing only the Speed, Acceleration and tackling stats of the teams in your group. This can be time consuming but makes beating the machine on "hard" much easier.
Change the difficulty back to Easy after the pool stages and win the tournament for another easy 50G -