Let's say there's two matches happening and they end with the following scores:
Iceland 0 - 3 France
Portugal 4 - 1 Luxembourg

If you created a "matchmake" a bet between France and Portugal, your bet would be settled based on the scoreline of each respective team, and it would end with the following score:
Portugal 4 - 3 France

For example, Over 6.5 would be a win and Portugal ML would be a win, while France +0.5 would be a loss.