Here are the requirements.

1. The website should be fully responsive, functional on mobile devices.
2. Copy of this website - https://fanfight.com/
          1. UI
          2. Check Game Center 
3. User should be able to login with Facebook, Google account.
4. User can add the Custom account.

For Fantasy sports data - Prepare a dummy data from https://fanfight.com/ and build the app on the basis of that.