Suggest a scoring method for a friendly competition

My mate and I are supporting England in the World Cup.
Just for fun, we’ve decided to try to predict the results and scores between ourselves

Now I need a method to decide who wins - so your help is invited.

I thought of this:

  • 10 points for forecasting the correct result (none for anything else)
  • -1 point for each goal away from each team’s actual score (so if I put 2-0 for England v Croatia and the result is 4-2 I lose 2 points for each team’s score…i.e. -4)

Over to you…