Most tactically complicated sport?

[orange]

Not sure if this has been discussed here. Friend and I were discussing what is the most complicated/most strategy intense sport out there right now.

I have not played soccer/baseball much (or at least on the level where there are plays/etc (and I know there are), nor have I played many other sports at high levels.

However, he argued that it was professional football. He is a Madden junkie and talked about how complicated the game can be due to all the different schemes and formations in the game.

So, what, in your opinion, is the most tactically complicated sport? Any experience in the sports is great, or if you just know alot about it.