Nowadays, utilizing technology in tennis is expanding such as game analysis, motion analysis, managing athlete’s conditioning, and line judging. Tennis players are able to deepen their understanding of performance by showing with scientific findings that is quantified and visualized.

Hence, technology contributes to improving athlete’s performance and judge fairness. However, in order to effectively utilize scientific findings, coaches and athletes need to work to select and understand the necessary information from the data presented. Moreover, the player’s own sense of their performance and qualitative evaluation by coaches is also important such as the feeling during the swinging motion. For example, tennis players prepare for their swing by measuring the distance to the ball as they hit it. At the time, they predict the depth, speed, and type of spin of the opponent’s shot by using Kinästhese such as ability of perspective to ball and so on.

Therefore, this paper shows some examples of technology used for the purpose of acquiring skills especially in tennis, and also refers to the importance of Kinästhese which cannot be clarified by technology. It is believed that the importance of the athlete’s Kinästhese will remain unchanged despite the advancement of technology.

 There is something called an ATP ranking in tennis. The points you are able to gain by winning in various tennis tournaments determine this ranking. That point is determined by the amount of prize money you can gain in tournament. You gain more points if you win in tournaments with higher cash prizes. In all tournaments, players with higher rankings have the higher priority of entering in that tournament; so top-ranking players are prioritized to enter tournaments with higher cash prizes. Players with lower rankings must play from the qualifiers or they must play in lower cash prize tournaments to raise their ranking. To raise your rankings, players obviously must play better tennis, but the choice of the tournaments you wish to compete in will also make a big difference. So in this research, I chose to write about how to choose tournaments to become a top-ranked player. So in order to find out how to choose tournaments to get into the top 50, I decided to compare the tournaments that top 10 players enter, and the tournaments that the top 50 players enter. And then investigate them after putting them in chronological order.

 I checked the 8 players who have experienced being in the top 10, and 8 players who have never been in the top 50s. I investigated these 16 players, the tournaments they played in, and divided them into groups. I used the step-wise method to place the players into their groups.

 In result, by looking at the tournaments that players entered, I was able to find out that the higher ranked players entered less low-level tournaments such as the futures tournaments, and the challengers tournaments (no more than 80), and then started playing in the tour tournaments. I also found out that many young players under the age of 18 play in many low-level tournaments, and that it takes less time for them to get to reach their personal best ranking. There are many players who are ranked below 50 playing in challenger tournaments, but it takes them many years and many tournaments for them to reach that level. On the other hand, even if you are a low ranked player, it is possible for that player to become a higher ranked player if he reaches his personal best rank in fewer tournaments.

 So, in order to become a high ranked player, it is necessary to play in international tournaments at a young age, and to try to reach your personal best rank in less time. But, the most important thing, is to play in less challenger tournaments and play in more tour level tournaments, if you have a high enough ranking.