Sarri wants Lazio to play through the opposition in the central areas.
Having possession of the ball in the middle third in a positional attack Lazio structure becomes a lot narrower in the central areas.
Sarri prefers having positional superiority between the lines.
4-3-3 when they are in the build-up phase, Sarri wants his three midfield players hold position themselves in different areas of the pitch in order to stretch the opposition vertically.
He like to break through an opponent’s high block also by high press before playing through and establishing passing triangles and diamonds around the ball carrier.
Maurizio Sarri profile on tacticof.com