[xxNos4r2xx]

L2+R2+X is the key...

You want to stay by your opponents side the whole way, if you are by his side 80% of the time they won't try to cross into teh box because you will be in the way. When they stop to try and get around you thats when you let go of L2 and try to take the ball away. This is my best tactic as alot of the time I set my tactics to Counter Attack, so once I retrieve the ball deep in my defence my midfielders and attackers set up really quickly for attack.

Also, slide tackling seems to be a tactic that has almost disappeared from fifa09 because everyone is affraid of getting fouled. If you come in from the side I would hold O to bring in an extra defender and then go a slide tackle, if the ball rolls away your extra defender should colelct the ball, if you give away a foul it almost will never be booked and if you do it will only be yellow. But that doesn't matter though because you achieved your goal of stopping their attack on goal.