What is form in football?

The most common display is the result string of the last five matches: W for a win, D for a draw, L for a defeat, so a run like WWDWL summarises a team's recent past at a glance. A form guide on a league table typically lists this string next to each side.

The picture deepens when the goal trend is added: a team winning repeatedly while conceding in every match is not in the same form as one winning while keeping its goal intact. At player level, form is followed through minutes, goal contributions and in-game influence.

Five matches is a small sample, and the context behind the string is invisible. A side that won its last five against struggling teams is not in the same form as one that produced the same run against title rivals. The mix of home and away fixtures, injuries, rotation and schedule congestion all shape the string.

Results are also open to fortune: two undeserved wins can polish a form line. That is why analysts look past the raw result string at the chance production trend, the xG line; a team creating strongly while losing is in better form than it appears.

Form produces meaning together with other inputs, not alone: the two teams' form lines, their head-to-head history, the venue factor and squad availability are weighed as a whole. A rising form line can signal that a game plan has settled; a sudden dip usually coincides with injuries or a congested schedule.

The most informative reading is the direction of the trend: within a five-match string, the last two results tell a more current story than the first two. Form should be read as a curve with a direction, not as a photograph.