For decades the four majors ended a deciding set in different ways. The convergence towards a common format came from scheduling pressure rather than from any change in principle.
Why the tie-break was introduced
Before the tie-break, a set continued until one player led by two games. Sets could extend indefinitely, and matches ran past the point where a court could be scheduled.
The tie-break caps a set at a defined point, converting an open-ended contest into a first-to-seven sequence with a two-point margin.
It was accepted quickly for most sets and resisted for the deciding one, where the traditional advantage ending was felt to reward endurance appropriately.
What an unlimited final set produced
Extended final sets created matches lasting many hours, occasionally spilling across days. The winner was frequently unable to compete effectively in the next round.
The knock-on effects were severe. A single long match displaced the order of play on several courts and pushed later matches into darkness.
Broadcasters faced the same problem from the other direction, holding open a slot of unknown length while other matches went uncovered.
The interim period of difference
Each major responded separately, and for a time the four events used different deciding-set rules, some capping at a standard tie-break and others at an extended one.
Players therefore had to prepare for four different endings across a season, which was defensible as tradition and difficult to justify as sport.
The inconsistency mattered most in tactics, since a player managing energy behaves differently when a set can run indefinitely.
Why a longer tie-break was chosen
The eventual common format uses a longer tie-break in the deciding set, requiring more points than the standard version while still capping the match.
The choice is a compromise. A longer target preserves some of the endurance element that the traditional ending rewarded, while guaranteeing an end point.
It also keeps the scoring familiar. Players already know how to play a tie-break, so the deciding sequence needs no separate skill.
What was lost and gained
The marathon final set is gone, and with it a category of match that produced some of the sport's most discussed contests.
What replaced it is a schedule that holds, a reduced injury risk in later rounds, and a draw where the winner of a long match still has a chance.
The trade is characteristic of modern scheduling. Predictability is bought from variance, and the sport keeps the part of the spectacle it can actually broadcast.
