Crown in team battles

Can you please provide a link to one of these team battles?

Do you see where it says "20 leaders"
The crowns are for the top 20 (or amount of leaders) players in a team!

So for example, if I, you, and Thibault were in a team, Thibault has 35 points, you 27, me 21, and it were only 2 leaders, you and Thibault would get the crown.