When you start Rivals Division for the first time, http://www.fifauthack.com/ you will play a series of placement matches to see your level against other players. You will receive an assessment based on your performance in these matches, which determines your division. The result of each game you play in your division during the week affects your level, each match won will earn you points (a bit like a team clash) and depending on the points earned you will be able to move to a higher division. .
Each week in Rivals Division is a complete new competition and you can earn rewards at the end of each week. Your weekly score determines your rank in the division and a higher rank means a better choice of rewards at the end of each week.
Basically you will have a rank inside your division.