Italian matches often look like two different games either side of the interval. The pattern comes from a coaching culture that treats the first half as information gathering.
The first half as reconnaissance
Italian sides commonly begin in a compact shape, conceding territory while establishing what the opponent intends to do with the ball.
That caution is not passivity. It is a deliberate choice to learn the opposition's build-up pattern before committing to a pressing scheme that could be bypassed.
Matches consequently start slowly and with few clear chances, which reads as dullness from outside and as preparation from the bench.
Half-time adjustments are expected
Italian coaching places heavy emphasis on in-match correction, and the interval is treated as the primary opportunity to change the plan rather than a rest.
Adjustments are usually structural, moving a midfielder's starting position or changing which opponent is pressed first, rather than swapping personnel.
Because both benches are doing this, the second half frequently begins with two teams playing differently from how they finished the first.
Substitutions arrive as a package
Italian coaches often change two or three players together rather than one at a time, using the substitutions to install a different shape in a single move.
A double change alters the balance of a match abruptly, which is one reason Italian games swing in the final half-hour more than they do in the opening one.
The expanded substitution allowance has amplified this, giving coaches enough changes to reshape a team twice within a match.
Score state does the rest
Once a goal arrives, both teams' incentives change sharply, and a side that spent forty-five minutes defending compactly may have to open up entirely.
Trailing teams push their full-backs higher and shorten the distance between their lines, which creates the space that had been absent all evening.
The result is that a large share of goals arrive after the first one, and matches that were goalless at the break rarely finish that way.
What this means for watching a Serie A game
Judging an Italian match on its first half is usually a mistake, because the half was not intended to produce chances.
The informative moment is the first ten minutes after the restart, when both adjustments become visible and it is clear which coach read the situation better.
Late goals in Italy are less often a matter of fitness than of the accumulated effect of two benches deliberately changing the problem.