Why do I lose points despite winning 2 battles in the Tag Team Arena?

When you fight against the opponents with a lower Tag Arena Ranking and win 2 out of 3 Battles, you may still lose your Tag Arena Points.

The number of Tag Arena Points that you can earn is indicated before the start of the battle. Thus, you can check whether it is worth attacking the enemy team. Choose your opponents wisely to get the maximum number of Points.