Changing tactic

I have a rather decent tactic and I'm winning a lot of games and now I am curious about when other teams are going to make counter tactics. How long does it take and what should I change when they do, any advice? Thanks in advance!

It's less a question of teams directly countering you and more a question of teams simply playing more defensive.

As such, the extent to which you will have to adapt depends entirely on your set-up. You may not have to change anything. You may have to work out an entirely different approach. If you post what you have now, we might be able to provide some ideas of what to try if you find yourself struggling down the line.

I often see teams change tactics at half time, but they can change earlier or later in a game, it might depend on the opponent managers tactical knowledge rating?

I don't think anyone "directly changes to counter you" after x time like some people think, its probably just a shift in reputation and how other teams view you.