Defend a 2v2 as a partnership. Press the ball and show it one way, cover behind at the right angle and distance, rotate the roles on the switch, and step in to win the forced pass.
Two defenders defend a gate against two attackers. The nearest defender presses the ball and shows the carrier away from goal, the other covers at a supporting angle. When the ball is switched, rotate: the cover steps to press and the presser drops to cover, and step in to intercept the forced pass. Communicate press and cover throughout. Rotate roles and pairs.
Press and cover fails on the cover, almost never on the press. The first defender's job is intuitive and players do it willingly. The second defender's job is counterintuitive, involves standing somewhere that feels too far from his own opponent, and is where the whole partnership breaks down.
The specific error is standing flat. Two defenders level with each other occupy the same horizontal line, which means a single pass between or past them beats both simultaneously. Dropped a few yards behind and angled inside, the cover defender is positioned so that any ball beating the presser arrives in front of him rather than behind. He has converted one pass into two problems for the attackers.
Distance is the second variable and it is a genuine trade-off worth naming. Too close and both defenders can be beaten by one combination. Too far and the cover cannot reach his own man when the ball is switched, which leaves an unmarked attacker. Roughly five to seven yards behind and inside is workable, and it changes with the speed of the attackers.
The rotation is what makes it a partnership rather than two roles. When the ball switches, the cover becomes the presser and the presser drops to cover, without discussion. Pairs who fail to rotate end up with both defenders on the same side and the pitch open behind them.
Talking is not optional here. The cover defender can see the whole picture and the presser cannot, so the information has to travel from behind to in front.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.