Match structure and the running clock

Football's clock works almost the opposite way to basketball's, and that single fact explains a lot about how matches play out.

Two halves, no stopping

A match is played in two halves of 45 minutes each, with a short half-time break between them. The clock runs upward from 0 to 90, and — crucially — it does not stop for fouls, throw-ins, goals or substitutions. Play just keeps flowing.

Stoppage (added) time

Because the clock never stops, the referee tracks time lost to injuries, substitutions and time-wasting, then adds it on at the end of each half as stoppage time (also called added or injury time). You will see a board showing "+3" or more. Goals scored in stoppage time count fully and routinely swing late results.

Why a running clock matters

A team holding a 1–0 lead late can run the clock down by keeping possession in safe areas — there is no shot clock forcing them to attack, so leads can be strangled out rather than protected with fouls. It also means game state matters enormously: a team that scores early can sit deep for an hour, which suppresses further goals. That is very different from a sport where possessions keep cycling at a fixed pace.