I have had this problem for fifa 14 aswell, i bought a xbox one with fifa 14 and when i try to look for a game on fut it says Opponent found and a few seconds later it says you opponent has left the match, or just that it couldnt connect to the opponent.
I thought that with fifa 15 I wouldn't have this problem but it's still there and now i cant play my fifa 15 PLS HELP !!!!!!!!!!!!!!!!
UnPnP was already enabled on my Router and still have this problem. What are the ports inbound & outbound that need to be enabled for Fifa 15 to work most effectively on the Xbox One?