After Chen Xiaojian decided on the two goalkeepers, he began to consider the defenders.

Four defenders, two full-backs and two centre-backs.

The main task of the full-backs is to prevent the opposition player from passing the ball from the touchline into the box. At some point, there is also a certain number of marking tasks.

In addition to the defensive task, the full-back must also have a certain ability to insert back to assist and cross, which can make the team's attacking style more three-dimensional.

Because Chen Xiaojian decided to play a 4-2-3-1 formation with two wingers, the two full-backs need to have enough speed and good physical strength.

In Chen Xiaojian's tactics, the two fullbacks need to have a certain ability to move forward while taking on the task of defending on the side.

Whether it's plugging in with the ball, linking up with a winger, or pushing forward to fill the gaps left by a winger's attack, the full-backs need to have the stamina and speed to help them in attack while completing their defensive tasks.

Of course, Chen Xiaojian will not ask for both wings to be inserted at the same time, so he may help the team in the attack, but once the two fullbacks have inserted assists, the gap left on the side is too large, and it is easy to be directly penetrated by the opponent's defensive counterattack.

Chen Xiaojian's requirement for fullbacks is to insert assists on one side, and the other side must stay in the backfield after a certain side is inserted, and when ensuring that the back line is at least three backs, the back in front of the defender increases the thickness and width of the defense, so that it should be able to deal with the opponent's counterattack well.

Chen Xiaojian looked at the test data and thought about it for a while, and then wrote the names of Li Bing, Bian Yuanya and Liu Zhongfei on the back of the fullback.

Among them, Bian Yuanya and Chen Xiaojian are clearer, Bian Yuanya's weight is relatively light, but his relative speed is relatively fast, and he has good physical strength.

In the two-hour long-distance running test, Bian Yuanya has always been in the first group and has never fallen behind. This can basically ensure that during the game, Bian Yuanya can complete the task of going straight up and down on the side.

Li Bing is the same, and compared to Bian Yuanya, Chen Xiaojian found that Li Bing actually had a good cross footwork.

In this way, Li Bing can complete more tasks on the side to cross or pull the ball on the side.

So Chen Xiaojian wrote the word "biography" behind Li Bing's name.

As for Liu Zhongfei, Chen Xiaojian decided to let him be a substitute for the fullback, because compared to Bian Yuanya and Li Bing, Liu Zhongfei's physical strength is relatively poor. But Liu Zhongfei has many advantages in Chen Xiaojian's view.

There's the body, there's the pace, and there's a good pass. If Liu Zhongfei's physical strength was better, Chen Xiaojian wanted to replace Bian Yuanya and let Liu Zhongfei play the main fullback.

But Liu Zhongfei's physical strength could not support him to run the whole field, so Chen Xiaojian could only put Liu Zhongfei on the bench. However, in this way, it can also leave Chen Xiaojian with more coping plans.

For example, when you are in an advantageous game, you can replace Liu Zhongfei to strengthen the strength of the defense, and if you are behind, you can also replace Liu Zhongfei to strengthen the attack on the side, and you can even promote Liu Zhongfei to the position of winger, and then promote the winger to the forward position.

In this way, it has become a four-striker fighting formation, of course, this is the worst plan, Chen Xiaojian certainly does not want this situation to occur in the game.

Once you've decided on a full-back, it's time to think about centre-backs.

In general, centre-backs are usually tall, have good physical fitness, and need to have some heading ability.

Whether it is a traditional English central defender or a more artistic Italian central defender, physical condition is very important. If you don't have excellent physical fitness, it's hard to have the upper hand against a top center.

Whether it's a tall and mighty man like Ferdinand, or an elegant and artistic one like Nesta, he has a body that doesn't daunt any top centre-forward.

Header ability is also a condition that a centre-back needs to have, whether it is defending corners, free kicks or participating in corners and free kicks in attack, a good header can play a huge role.

Among them, Chelsea's captain John Terry and Real Madrid's central defender Sergio Ramos are among the best, and the reason why Chelsea can reverse is often related to Terry's huge impact in the penalty area. And Ramos's header turned the tide for Real Madrid in the last moments on several occasions.

Most of the time, because the centre-backs are more likely to defend in the box and are the last barrier in front of the goalkeeper, they rarely choose to possess or pass the ball to these centre-backs under heavy pressure, they usually just clear the ball from the danger zone.

Fewer assists have been inserted, making the physical demands of the centre-backs less stringent.

Chen Xiaojian wrote the names of Lin Hengfeng, Li Bing and Chen Zhichao behind the central defender.

All those who have seen Lin Hengfeng will feel that Lin Hengfeng's figure and his name are definitely a perfect match, with a height of one meter and eighty-five meters and a strong body.

That station is like a wall, excellent physical fitness and outstanding heading ability, in Chen Xiaojian's view, Lin Hengfeng is the perfect template for dragging back central defenders.

The other marking central defenders Li Bing and Chen Zhichao are actually competent, and the data of the two are relatively close, but in the end, Chen Xiaojian still decided to let Li Bing play the main marking defender.

Because Li Bing's turning speed and starting speed are relatively better, it is also more conducive to Li Bing's containment of the opponent's fast forward.

Chen Zhichao can be used as a substitute central defender, because Chen Zhichao's body is stronger than Li Bing, if necessary, Chen Zhichao can not only replace Li Bing, but also serve as Lin Hengfeng's substitute when necessary.

Li Bing, Lin Hengfeng, Li Bing, Bian Yuanya, this is the main defense four-person group determined by Chen Xiaojian. Chen Zhichao and Liu Zhongfei are defender substitutes.

In this way, there are three people in each position who can rotate, after all, it is only a high school league, and the requirements for the player's positional sense are relatively low.

Otherwise, it is difficult for a wing-back player to play at two full-backs at the same time, as can the opposing centre-backs.

Although the left and right of the central defender are not very clear, in professional games, the division of labor between the left and right central defenders means that when the full-backs around them are forward to attack, the central defenders need to be pulled to the side to fill in the position.

In the case of filling, the left and the right are two completely different feelings.

Fortunately, this is just a high school league, Chen Xiaojian thought secretly in his heart.