You can block up to certain number of players. If you want to block more players, you can trade some gems for additional block places(slots).
To do this:
1. Open your profile.
2. Open your list with blocked users.
3. You will see the option for "Add more slots" at the top of the page.
The block option doesn't work in the tournaments.
To do this:
1. Open your profile.
2. Open your list with blocked users.
3. You will see the option for "Add more slots" at the top of the page.
The block option doesn't work in the tournaments.