View online leaderboards for a variety of gameplay results/trials.
After selecting an item, switch between the following onscreen displays by pressing the /.

・ Your position in the Leaderboards
・ Leaderboards for your friends on Xbox Live®
・ Leaderboards within Rival List
・ Leaderboards for all players

While leaderboards are displayed, you can add a specific user to the Rival List from the menu that appears when you place the cursor over the user's name and then press the button.
(While the Rival List is displayed, you can also remove a user from the list.)
You do not need a player's approval to add them to the Rival List, and they will not be notified when you do so.