"Sliding skills?" Although Li Cai upgraded the skill of tennis movement and pace mastery to the orange grade.

However, they are all general moves, and if you use a sliding technique on clay, you will have a special sliding technique, which is exclusive to the clay court, not a general sliding move.

After listening to Coach Zhang's advice, Li Cai practiced his sliding movement skills on the clay court and found that it was not as comfortable as the usual hard court.

"How about it, you can still adapt to the footsteps on the clay court!" Coach Zhang asked nervously, after all, this was the first time he had put forward his opinion, and Li Cai had adopted it.

"It's still a little different from hard ground, and the feel of the shoe is not the same. Li Cai stopped, and then said: "Maybe I haven't mastered the special sliding skills on the clay court yet!"

Coach Zhang immediately said: " The flatness of the clay court is certainly not as good as the hard ground, although the surface looks similar, and the foot pedal is the same, but in fact there are still a lot of uneven places, although it is not easy for us to detect with the naked eye, but after the ball falls up, it will reflect obvious changes, and the direction of the ball flight will be affected because of this unevenness, so the variables of the clay court will be greater, and because of this, many players like to choose a more conservative style of play on the clay court, and the offensive style of play in front of the net that you are good at has a greater impact here。 ”

Coach Zhang remembered another piece of information, and then said: "The clay court usually needs a lot of care, and it needs to be sorted out and drawn frequently. When it comes to the French Open, although the court will be cleaned up after each day, the high-intensity matches will definitely make the court more uneven, especially the main stadiums Philippe Chattier and Susan Lenglen, which will play for fifteen consecutive days, so when it comes to the later matches, the tennis players will be more and more affected by the ground. ”

Li Cai listened to Coach Zhang's analysis, thought about it for a while, and found that this was indeed the case, the last time he won the French Open, although he also used the pre-net play, but he also used a lot of bottom-line techniques, unlike on hard courts and grass, basically using pre-net techniques.

Seeing Li Cai listening carefully to his opinion, Coach Zhang became interested and said everything he knew: "The ground of clay is not very hard, there will be greater friction when the ball lands, and the ball loses a large part of its kinetic energy, so the speed of the ball jumping will be relatively slow, so it is also called a slow clay court." If you use a flat serve, the ball speed will be weakened a lot, and the original 280 km/h serve will only be about 240 km/h at most, or even lower due to various factors. ”

Li Cai frowned when he heard this, obviously his charged serve has been greatly restricted here, but if he only uses external rotation serve, he always feels unsafe.

When Coach Zhang saw Li Cai frowning, he knew that he was worried about the problem of serving, and immediately said: "But don't worry too much, Li Shao, your topspin ball is also top-notch, just suitable for the clay court of the French Open." ”

Li Cai listened, although he didn't know why, but he knew that Coach Zhang would definitely explain.

Coach Zhang didn't explain first, but picked up the racket, directly used a serving action, and hit a topspin ball for Li Cai to see.

The tennis ball bounced up on the ground, and the speed slowed down again, but the ball bounced very high, almost to the position of Li Cai's chest. Although Li Cai is young, you must know that Li Cai is now more than 1.8 meters tall, and his chest position is similar to that of many tennis players.

"See, isn't it very high?" Coach Zhang continued: "This is another big feature of clay courts, the topspin ball will bounce very high, my topspin ball is very ordinary, but it can play so high, and it is far from the top players in the world, you know that." Normally, Federer would hit a topspin on clay, and the ball would bounce to the shoulder, but in the case of Nadal, the "king of clay" and a good topspin ball, the ball would often reach the top of the player's head. You know, the tennis ball is flying overhead, and it must be very difficult to receive the serve, and you will not be able to play a beautiful return. And your topspin, through data comparison, is similar to Nadal, it is the same level of topspin, but your topspin is more intense, a little difficult to control. ”

After Li Cai listened, he nodded, Coach Zhang's analysis was indeed in place.

It seems that in the French Open, he will use external rotation to serve again.

Suddenly, Li remembered a question.

"Doesn't that mean that tall people will be more advantageous on clay courts?" Li Cai said. While trying to play an outspin serve. The spin of Li Cai's serve was not weaker than that of Nadal, and the ball bounced directly above his head after landing.

Li Cai was suddenly a little surprised, he didn't expect this ball to bounce so high. You know, he didn't use the outspin serve seriously.

And the last time he played the French Open, it was as if his serve was not so high.

Because more than a year has passed, Li Cai has almost forgotten the process of last year's French Open, after all, there are too many competitions, and he has a lot to do.

And Coach Zhang's question about Li Cai immediately explained: "In terms of height alone, it can indeed be said that tall people have an advantage, but don't forget that in the current tennis world, tall athletes use that kind of more violent style of play, just like Karlovich, who can hit more than 50 aces in a game, which is simply terrible." However, they also have the obvious disadvantage of being lacking in footwork, which is the most important thing on clay. Due to the slow pace of clay courts, it is easier to catch the ball, even if you are not very tall, you can catch a high ball!"

"When you're on hard courts and grass courts, you're always going to win with one hit, and very few people can play long rounds with you, except for some of the top tennis players Federer, Nadal, Djokovic and others. In a slow-paced arena like the French Open, there aren't many chances of a one-hit victory, with frequent maneuvers over multiple rounds being the most common, so this will be a test of your stamina. Coach Zhang stretched out three fingers and continued: "So playing clay, you have to remember the three most important points, one is agile reaction, the second is rapid movement, and the third is tenacity!"

After listening to the data analysis brought by Coach Zhang, Li thought for a while and felt that it made sense. The last time I played Nadal at the French Open, I almost lost my strength and was going to lose the match, if I hadn't relied on my will to hold on, I would have lost the match, and I wouldn't have been able to win the French Open Grand Slam.

Therefore, in the next clay training, I have to solve the endurance factor.

So, Li Cai turned on the system, ready to upgrade his innate endurance to the orange grade and solve the problem of endurance.

Li Cai looked at the talent of Superior Endurance (Red) Lv1, and spent 1 million achievement points to upgrade to Superior Endurance (Orange) Lv2.

If it weren't for the fact that he still needed achievement points to upgrade the system and go to the Time House for training, Li Cai would have wanted to upgrade the talent of superior endurance to the full level.

However, it cost a million, but he didn't fill the skills in his talent, and Li Cai could only sigh that skill upgrades were much cheaper.