Anyone can make a possession tactic by choosing some of the following:
- Conservative mentality
- Wide formation with one striker
- Shorter passing
- Play out of defense
- Dribble less
- Work ball into box
- Urgent pressing
- Prevent short GK distribution
- Using lots of support duties
- Telling players to cross less often
- Slower tempo
- Short corners
- Short throws
Getting goals out of this type of setup will require technical players with good passing, vision, acceleration, anticipation, decisions, and off the ball movement.
The biggest impediment to possession in FM20 is that underdog teams love to waste time and pass around the back between GK and defenders. Even an urgent pressing tactic will have trouble preventing this, so you need quick ST, AMR, AML players with high work rate to really disrupt those passing lanes and prevent the opposition GK from having 60-80 passes in a game.