you should study your opponents, look at their player stats and position.
by that you have a rough idea of what your playing against.
your defense and offense will depend on the type your opponent is doing. the player ratings are somewhat idea of how you did. but if you lose now it doesnt mean youll lose the next time whether your prepared or er.. . . not prepared.
even though your tactics are correct but your player skills somewhat lacks you still have a matter to think.
its how you combine your players . . .
just a thought