After a brief absence, Rochus regained his normal thinking, "I have been paying attention to Zhang Guan's serve, so I didn't see clearly how this ball came, and I didn't even see where the ball fell. Has the referee already awarded the ACE ball, indicating that it is within the bounds, but did the referee misread it? Should I try to challenge the hawk-eye? But if the referee did not make a mistake, I will waste it in vain."
The Hawk Eye system is also called an instant playback system. It is a computer system used in tennis to track the recorded path of the ball and display a graphical image of the actual path recorded. It can also predict the future path of the ball. The entire system uses eight to ten high-resolution fast cameras to capture the trajectory of the tennis ball at all angles of the court and then uses 3D technology to simulate the presentation.
This system can help the referee to make a penalty to determine whether the ball is out of bounds. And when the athlete thinks that the referee has made a mistake, he can also ask for a hawk-eye challenge. According to the rules, each athlete has a total of 3 hawk-eye challenges in each set, and if the game enters a tie-break, there will 7 chances. If the athlete succeeds in the challenge, then the challenging opportunity is still reserved. If the athlete fails in the challenge, he or she will lose a chance to challenge.
This technique came out in 2001. The 2006 US Open became the first Grand Slam tournament to be assisted with hawk-eyes, and this year's Australian Open was the first to use the hawk-eye system. At the same time, the hawk-eye system is not available in every course. Only the big stadiums will be equipped with the hawk-eye system, and the small stadium will not spend money to install the hawk-eye system.
Today Vodafone Stadium where Zhang Guan and Rochus are located is the second-largest stadium in the Australian Open. Of course, it is equipped with a hawk-eye system.
Just when Rochus was still hesitating whether to challenge Hawk-Eye, there was an exclamation suddenly in the audience. Everyone's eyes were turned to the display card on the side of the court showing the speed of the serve, Rochus looked at it, and saw the number "208".
"Serving at a speed of 208 kilometers per hour! It was so fast!" Rochus immediately thought of another possibility immediately after the shock, "The referee may not be able to see so quickly." And this is also Zhang Guan's first time in the tennis game For a serve, if the referee cannot see, to encourage the players, it will probably be counted in the circle. In this case, I have a great chance of success in challenging Hawk Eye!"
Rochus thought of this and immediately signaled to the referee that he would challenge the hawk-eye system.
The 3D simulation picture of the ball quickly appeared on the big screen on the field. The ball fell within the boundary, and there was a full distance from the sideline.
"Oops, wasting a chance to challenge such an obvious in-bounds ball, if you just focus a little bit, you can see that it is in-bound. How can Zhang Guan send such a fastball? It must be a coincidence. Rochus's face was frustrated, and then he was ready to catch the ball again.
Zhang Guan started his second serve, tossing, swinging and hitting the ball, all in one go.
This time, Zhang Guan still used a flat shot to serve, and Zhang Guan made adjustments in this serve, and he chose to make the ball fall closer to the sideline.
"Whoosh!" Rochus had a lot of attention this time. He saw the ball fly over, and then just about to make a catch, but suddenly realized that his action was late, this ball will not be received again.
This time, Rochus did not hesitate. Since he is destined not to receive the ball, he must carefully look at whether the ball is out of bounds.
"Out of bounds!" Rochus shouted in his heart, but the ball fell into the bounds.
"ACE, 30-0." The referee broke the score again. However, a ball speed of 207 kilometers also appeared on the display next to it.
"Oh... oh... oh..." There was a startling voice again in the audience.
"207 kilometers, as fast as before! The speed of serving twice in a row exceeds 200 kilometers per hour! This is difficult to achieve. Zhang Guan is just a track athlete, how can his arm strength be so amazing? He doesn't seem to have engaged in throwing events. Is this a coincidence? Or is this a method of serving that he is good at?" Rochus vaguely felt a little bad.
"The third ball, if he still serves it just like that, it is not a coincidence!" Rochus stared at Zhang Guan, and the opposite Zhang Guan made preparations to serve the third ball.
"The same ball has been served twice in a row. Rochus may have found some patterns. This time it is more necessary to pursue the angle." Zhang Guan thought of this and directly aimed at the position of the sideline and issued this ball.
"Come! The sideline!" Rochus rushed over quickly, but Zhang Guan's quality of the ball was very good, and Zhang Guan's luck was also very good, the ball just flew out against the sideline.
In the rules of tennis, seeking pressure on the line, even if it is only suppressed a little, can be regarded as inbound.
"ACE, 40-0." The referee announced the score.
"It's an in-bounds ball! Just by holding the line, Zhang Guan's luck is really good. With such a fastball, it can be out of bounds a little bit. Zhang Guan's serve is the same as the previous two, it is extremely fast, I am afraid the ball speed has exceeded 200 kilometers!" Rochus looked at the display card. The speed of this ball is 204 kilometers. Although it is slower than the first two balls, the ball speed still exceeded 200 kilometers.
"204 kilometers, as it is, like my previous judgment, the first two shots are not coincidences. This is the method of serving that Zhang Guan is good at! It is incredible, serving speeds exceeding 200 kilometers per hour! But serving speed is not enough, I know that you haven't figured out your routine yet, I can try to catch it next time." Rochus was full of fighting spirit.
Zhang Guan, who was standing opposite, silently recalled the situation of the last ball.
"I used the same method of serving three times in a row, so the last time, Rochus had already judged the right place. If I continued to serve the original, he might be able to catch the next one. Look like it's time to add some spins!" Zhang Guan decided to serve a topspin this time.
In the top-spin serve, the ball is mainly top-spin, and the side-spin is secondary. Since the ball is in the state of top-spin in the air, it will show an arc-shaped flight trajectory from top to bottom, the hit rate is relatively high.
The racket in Zhang Guan's hand hit the tennis ball fiercely, making a clear sound, and then the tennis ball spun quickly and flew out, crossing an arc in the air.
"The speed of the ball is slower than before! Three consecutive high-speed flat shots, does Zhang Guan no strength now? This time I will receive it!" Rochus rushed up immediately, but then Rochus hesitated.
"This ball seems to be out of bounds, um, it must be out of bounds like a flat serve, maybe I can ignore it!" Rochus hesitated, the ball was close to the ground, and at this time Rochus also looked at it which was clear that the tennis ball is spinning at high speed.
"No, it's not a flat serve, this is a topspin!" Rochus screamed in his heart. For the topspin, it is easier to control the landing point than a flat shot. If this is a flat shot, it will go out of bounds, but if this is a topspin, the power of the topspin will cause the tennis ball to fall within the bounds.
Rochus made a remedy immediately, but it was too late to go up again at this time. The ball landed in the field and spread quickly, and Rochus again did not touch the tennis ball.
"Love-game!" The referee announced the result of this round. The word "Love" means zero points in tennis terms, and "Love-game" means that the opponent won without losing any points.
Rochus did not win a goal, he was shaved by Zhang Guan.
Four consecutive ACE balls, the whole game, Rochus did not even hit the ball.