you can look at their formation, if they have pacey forward players, league position and form can also play a part. but take close attention to the first minutes of games, to see if they try to play balls over your defense or through balls down the wings. you can always change approach during the game. normally against stronger teams, at home or away i play tougher, at home to weaker teams i play smaller, away i normally go tougher, but pay more attention to how they play to see if i need to change approach.