Most tournaments limit each club to three substitutes during a game and a fourth during extra time, while additional substitutions are sometimes permitted in non-competitive games like as friendlies. The number of substitutes is usually specified by the tournament regulations or site-specific rules.
The number of substitutes is generally less than it sounds because a player can come on as a substitute at any point during the match. Usually only one player is replaced at a time, but multiple players may be replaced if there are enough replacements to form a complete team. For example, if a player is sent off and his team needs a replacement right away, they can replace him with another player from the bench or even introduce a new player who isn't registered with the federation yet.
Some clubs have a habit of replacing too many players, which can cause problems for their team by removing key players just when they're needed most. Replacing too few players leads to criticism that your club doesn't care about its players' well-being.
There are two ways you can look at it: either you have enough quality players to always have at least one ready to step in at any moment, or you don't.
Each side is allowed five substitutes in each match of the competition, with a sixth substitution being allowed during extra time. If a player receives a second yellow card they will be sent off and cannot further be substituted.
The introduction of video referees has increased the number of cards available to managers. Previously, only four red cards were issued by UEFA across all competitions in 2014/15. In that season's Champions League, a total of 106 yellows were shown to players; nine of these were due to VAR decisions and one was after further review. That same year, there were seven reds in the Europa League.
Since the start of 2015/16 season, six red cards have been shown to players in the Champions League. There have also been six such incidents in the Europa League. Two of these cards were for twice sending-off players (one in both matches). The other four reds were for serious offenses such as violence against officials or spectators.
In addition to cards, managers can also use substitutions in order to change the game state. However, only two substitutions are allowed in each half of normal time and one more in extra time if necessary.
To prevent disrupting the game, teams can only make five replacements during the match's three occurrences, which means teams will have to make numerous substitutions at least once a game if they wish to move more than three players. This is especially difficult because the replacement player cannot simply replace the absent player; instead, he or she is required by law to play along side the other remaining players on the team.
In fact, many professional players are unable to substitute more than once during a single game because of the time it takes them to change ends of the field. A study conducted by the University of North Carolina at Chapel Hill found that athletes lose about one percent of their peak ability per minute they are not playing sports. That means if a player is substituted after playing for ten minutes, he or she would be losing about one in ten of his or her ability to score goals or pass accurately.
In addition to losing valuable game time, substituting players also increases the risk of injury. Professional players tend to suffer from repetitive-motion injuries such as carpal tunnel syndrome and knee problems because they are often required to use their arms and legs without rest.
Finally, making multiple substitutions slows down the game. There is a limit of four substitutes on field at any given time, which means fewer opportunities for players to come on as replacements.
Law 3: The Players-Temporary Modification Each squad will be allowed a maximum of five replacements. To minimize disturbance to the game, each side will have a maximum of three substitute chances during the game; substitutions may also be performed at half-time. If a player is replaced by a member of his own team, he cannot subsequently be replaced by an opponent's player.
There are two ways that a team can replace a player: with another player on the roster or with a substitute. A team can play only five substitutes in a single game (see Law 3), so a club could have as many as 25 players listed on its roster but only use 23 of them during the match. The other two spots are reserved for substitutes.
A team can only have three players replaced by substitutes in any one game. This means that after these three opportunities have been used, any further replacements must be made from among the remaining players on the roster. However, if a player is injured and cannot continue, he can be taken off the field and a replacement brought into the game. The original player can then return to action when he has recovered from his injury.
In addition to replacing players during a game, clubs can change their lineup before a match starts. If a player does not appear in the starting XI sheet, he can be replaced by a substitute player.
Substitutions are limited in soccer throughout the duration of each game. Allowing several replacements in a game may result in an excessive amount of play breaks. You may have witnessed this firsthand. There is no restriction on the number of replacements that can be made in some non-competitive or "friendly" soccer games.
The substitution rule is one of the most complicated in sports. It is explained in detail below, but essentially, you are only allowed a certain number of substitutions per game. If you use more, the other team will be able to make more changes, and so forth. The more substitutes each team uses, the closer the match becomes.
In international matches, each player must be substituted off at the earliest possible opportunity. This allows the team time to react to any injuries that may occur during the game. In domestic matches, players are not required to retire from the game when they come out of the lineup. They can continue playing provided they remain on the field for less than twenty minutes without being replaced.
In Major League Soccer, there are two ways teams can equalize the score: through a direct free kick or by using the advantage of geography. If the score is tied at the end of regulation time, both teams will advance to a single extra period called a "penalty shoot-out". On the first try, the team that scored will progress while the opponent will be forced into overtime.