Why do football coaches decide the outcome of the game? Where do they show their role?

I believe that fans who often watch football games will remember many famous scenes of "substitution". When he was in a tough game, he didn't score points, and even at a disadvantage, the head coach's magical substitution changed the situation, and he still feels full of emotions when he recalls it.

For example, in the 2016-2017 Champions League one-eighth match, Juventus and Porto. At that time, Juventus's coach was Uncle Jiong and Allegri. Shortly after the opening, Porto's Tres was sent off with two yellow cards, playing one less person.

Due to the lack of players, Porto adopted the iron barrel tactic to compress defense. Juventus had a ball possession rate, but could not gain an advantage. There were even several times when the opponent's counterattack was extremely embarrassed.

Seeing the scene passive, Uncle Jiong made a magical substitution. He first replaced Cuadrado with Piazza, and then replaced Alves with Lichsteiner with his physical decline to strengthen his right-hand attack.

The two substitutions have received miraculous results.

First, Piazza made a strong low shot to help the team start the first record; then Alves replaced the field less than a minute, and then scored a goal. Juventus' two goals were all advantages obtained by the head coach's substitution and the substitute, which was a masterpiece.

Although this game is not a famous game and the scene is not particularly good-looking, Allegri's two magical substitutions left a deep impression on me. What kind of magical coach is the head coach who rejuvenates his youth and helps the team win through substitutions.

In history, there are many famous situations where magical substitution scenes can be achieved immediately.

1998/1999 Champions League final, Manchester United reversed Bayern 2:1. Ferguson replaced Sheringham and Solskjaer. Ferguson made two magical substitutions, and they both came on the bench to secure the victory; in the 2000 European Cup, France defeated Italy 2-1, Italy scored the first goal at the beginning, and Le Mail made a substitution later, Trezeguet, Pire and Vertod all played. As a result, these people contributed together to make the team reverse.

Firtod scored a tie first, then Pire broke through and made a cross, Trezege's golden ball was the classic scene in football history where the head coach substitution changed the situation.

Earlier, there was also the 1996 European Cup, where Bierkhov scored twice on the bench, helping the German team reverse the Czech Republic 2:1 and win the championship.

The German team with wounded soldiers was in a disadvantageous position; in order to restore the decline, Fogtz replaced their last ace, Bielhof.

As a result, the high center forward headed the ball and volleyed a shot, helping the team to achieve a reversal and win the championship.

Whenever you think of this scene, you will think of Bielhof's masterpiece, and the magical substitution of head coach Fogtz is also talked about by fans.

Without the on-site command of the head coach and the magical substitution, we would not be able to see these magical scenes, and those classic games would never be able to see them again.

While remembering the players, we cannot forget the existence of the head coach. Only by deploying troops and controlling the team reasonably can the team win the championship.

Just like fighting, without the command of the marshal, the generals fought everywhere, can they win? Whether it is a battlefield or a football field, it is important to have someone to command, and such a role is indispensable.

Excluding on-site command, off-field management is also the job of the head coach, and even plays a crucial role in the team's performance.

Do you still remember Arsenal's Wenger? What was the picture he was when he first came to the team. At that time, the team had a serious problem of alcoholism, and the off-field discipline was particularly bad, and the players' diet and training were very irregular.

Winger saw that the team's management was very bad, so he made drastic reforms to the team. In addition to training, players' diet, drinking and other issues are strictly controlled, and players are strongly required to live in a scientific way. Players must devote all their energy to the game.

Over the past twenty years, Wenger not only helped the team win the championship, but also improved the team's temperament, making Arsenal truly brilliant and becoming the top European giant team.

Without Wenger, there would be no Arsenal. His contribution to the team can no longer be described in words and has become the team's legend.

Many head coaches not only train players, but also have a lot of things behind them. We need to do our own food, psychology, family and other aspects, and the growth of players is inseparable from the coach's earnest teaching.

Before the troops move, the food and grass will come first. The head coach must be responsible for the overall mobilization behind the scenes, so that the team's management can be orderly, so that the players can show their full strength on the football field.

This is also the significance of the coach's existence in the team.