How to use the "No loss" hack:
So, basically, you need to play a Division Rival match after you use the "No Loss" feature on a Fut Champ match, because if you just go ahead and use no loss again on a second FutChmp match, the previous game will count as a lost game.
In short, "Play FutChmp match > Use no loss > Play DR match > Use no loss" so this way when you start another FutChmp match, only the DR match will count as a lost match.
