If you win the battle on the Tournament you receive the amount of points equal to the power of the defeated opponent.
Important: if you lose your heroes in this battle the amount of points received decreases. For example, you have defeated the opponent with total power 30 000. But during the battle you have also lost your own heroes with total power 10 000. In this case you receive 30 000 - 10 000 = 20 000.
Note: if the amount of points received is not enough to get the higher position in Tournament rating the amount of points is not displayed and you see the message that your place has not changed.