Page "Osvaldo Zubeldía" Paragraph 12

Zubeldía was a harbinger of tactical changes ; he was the first manager to thoroughly research rival team's tactics and playing style.

Pre-planned plays off free kicks and tactical fouls to stop rival advances were highly criticized at the time, but have since been adopted by virtually every team in the world.

So are other practices, like the offside trap ( having the defense step forward in sync to force opposing players into an offside position ) and using screens at corner shots.