A through ball is a pass intended to send a teammate into space beyond the defensive line or through a gap between defenders. It is played into the runner’s path rather than simply to feet.
What to watch
The passer and runner must coordinate timing. The runner’s starting position, the defender’s body orientation, and the goalkeeper’s willingness to leave the goal all affect the available space.
An illustrative example
A striker curves a run between center back and fullback as a midfielder passes into the channel. Watch when the pass is released and whether the runner can reach it without slowing down.
Avoid this mistake
Do not infer a successful through ball from the pass alone. The receiver may be offside, the goalkeeper may collect it, or the next touch may remove the advantage.