Score predictor in excel help??

Hi

I am doing a world cup predictor spreadsheet in excel. How do I match scores and assign points in excel?

eg. If someone predicts england to beat usa 2 - 1 then I want to assign them 4 points but if they beat them 3-1 i only want to assign them 1 point(the correct score must be got in order to get full points). any other result (usa win or a draw) would mean the person gets 0 points.

Its probably quite simple to do but i just cant seem to get my head round it.

Thanks
Al