Copa America has always been one of the competitions with the best news on the global football scene. Looking at the images from the Mexico-Chile match, it is clear how the key to interpretation for Chile revolves around Diaz in the phase without ball possession (skilled at acting as a shield for the defence and, when needed, falling back as a fifth defender), but especially during the build-up phase.
We can identify two build-up models that combine continuously: positional play and building up.
With Claudio Bravo in possession of the ball, Chile forms a diamond made up of Diaz (top tip) and Bravo (bottom tip) and the two centre defenders on the sides who open up and drop back to provide a better passing trajectory. The two inside midfielders tighten up behind the striker, thereby freeing up the lateral corridors which are occupied by the two external backs who step up quite a bit. The wings start wide and then move in to challenge the opposing defensive line and to create space for the outside backs, creating the ideal conditions for developing a lateral 2 v 1 situation.