I keep trying to play FIFA and I get the popup that says the disc is unreadable. I've taken it out multiple times and wiped it off, yet I'm still getting the same message. The disc has 0 scratches and works on another xbox.
This happened to me with assassains creed the other day. Put the disk in the tray, close, turn off your xbox, then reboot it with the disk already inside. It worked for me, hopefully it does for you too.