Mmmhhh... I'll never understand the "logic" of this game.

[kebess]

In real life, what changes basing on the mentality of the team is the zone where you are used to play and press the most. An offensive team like ie Barcelona has as main territory of play the part of the field going from half pitch to near the opponent's area. It's there that they do press, circulate the ball, and basically play the game. Now as matter of facts, how many offensive players has Barcelona out and how many defensive ones? It's actually 3-4-2-1, 3-1-5-1, or 3-6-1. If they'd actually use a 3-3 system, even with the DMs supporting the attackers they wouldn't have enough people to make the game in that zone.

Why? Of course they'd have enough people to make the game in that zone. In a real match, do you see 6 players standing on a straight line like this ? :

------x

-x-x-x-x-x-x

----x-x-x--

Of course not. You have at least 3, 4 players from that midfield line playing on the DM/AM area.
A 3-6-1, is always really some 3-2-2-2-1, or 3-1-3-2-1, or 3-3-2-1-1, etc... Those DMs/AMs have either red or blue arrows to help make the game on the midfield/AM area of the pitch.

You'll never have 6 "real" MCs, and whenever they'll lose the ball you'll see the DMs running back to defend the lower midfield zone, that's why they are called "Defending Midfielders". That's how it works usually -- you'll never see 6, or even 5, true MCs.