Each team starts with 10 points and has 1 point deducted for each yellow card its players are shown and 3 points for each red card. This can result in a negative score.
If a player is sent off as a result of being shown two yellow cards, 3 points are deducted for the sending off and none for the initial caution.
If a player is sent off having been shown a yellow card and a direct red card, points are deducted for both (1+3).