The extra midfielder was a defender

Citys treble team changed games by moving a defender into midfield zones. That adjustment helped the best passers receive under less pressure and gave the counterpress a stronger first wall.

Haaland changed the center backs choices

Erling Haaland did not need constant touches to shape matches. His runs made defenders protect depth, which opened more room for City midfielders to receive in front of the line.

Control came before chance volume

Some City wins felt patient rather than explosive because the first aim was to prevent the opponent from running. Once that was solved, the chances usually arrived from repeated pressure.

Why the idea still matters

The treble became a template for modern elite teams: attack with enough numbers to dominate the ball, but keep enough structure behind it that a lost pass does not become a crisis.