A replay is the repetition of a match in many sports.
In association football, replays were often used to decide the winner in a knock-out tournament when the previous match ended in a draw, especially in finals. In 1970, FIFA and IFAB allowed penalty shoot-outs to be held if a match ended in a draw after extra time. The penalty shootout made its appearance immediately thereafter. The first instance of a shootout replacing a replay was the final of the 1976 European championship. The shootout's first use at the World Cup took place in the 1982 semi-finals. Replays are now only used in the early rounds of the English FA Cup tournament, as well as rounds up until the semi-finals in the Scottish Cup. Replays also take place on occasion if a team has fielded an ineligible player in the original match, or if a player has been injured as a result of an action by a spectator.
In boxing, rematches have produced some historically significant moments in the sport. Examples include:
The National Football League has a clause in its rules that allows the commissioner to order a whole or partial replay of a game that has been corrupted by an "extraordinary act." For a partial replay, the game is reset to the point immediately before the play in which the act took place, with all game parameters set to where they were at that point. A full replay discards the result of the previous game altogether and restarts the game from its beginning. To date, the NFL has never used its extraordinary act clause. The rulebook states that the authority is only to be used in the event that "any club action, non-participant interference, or calamity occurs in an NFL game which the Commissioner deems so extraordinarily unfair or outside the accepted tactics encountered in professional football that such action has a major effect on the result of the game." Former commissioner Pete Rozelle refused on principle to use the provisions. Under commissioner Roger Goodell, the league also opposes using the power, mainly because of the domino effect it could have on the rest of the schedule and the financial ramifications that would result.
The 1948 VFL Grand Final between and was drawn 10.9 69 to 7.27 69, and the replay was comfortably won by Melbourne 13.11 89 to 7.8 50.
The 1977 VFL Grand Final between and ended in a 10.16 76 to 9.22 76 draw, and was replayed the following week, with taking the Premiership 21.15 151 to 19.10 124.
The 2010 AFL Grand Final between and ended in a 9.14 68 to 10.8 68 draw, and was replayed the following week, with taking the Premiership by winning 16.12 108 to 7.10 52. This would prove to be the last replayed AFL Grand Final, as from the 2016 season forward the league abolished Grand Final replays in favour of the use of two 5-minute overtime periods. If a Grand Final is tied at the end of the second overtime period, the siren that ends play will not be sounded until the next score by either team.
In Gaelic games, the final matches of the All-Ireland championships in each individual sport are decided by replays in the event of a draw. As in the AFL before 2016, extra time is used only if the replay is also drawn at the end of regulation. The most recent replay in the top-level finals of each Gaelic sport was:
* Men's football: In 2016, Dublin defeated Mayo 1–15 to 1–14 after the teams finished the original match level at 15 points.
* Hurling: In 2013, Clare defeated Cork 5-16 to 3-16 after the teams finished the original match level at 25 points.
* Ladies' football: In 1998, Waterford defeated Monaghan 2–14 to 3–8 after the teams finished the original match level at 19 points.
* Camogie : In 1981, Kilkenny defeated Cork 1–9 to 0–7 after the teams finished the original match level at 18 points.