Research On The Construction And Application Of "Four-stage Index Evaluation Method" In Tennis Techniques And Tactics

Tennis and table tennis belong to the same group,all belong to the net holding the score item.Both have similarities in group theory,sports competition theory,sports skills learning,etc.And on the basis of group theory,the latest cutting-edge technical and tactical statistical methods of table tennis will be used for reference,comparing the differences between tennis matches and table tennis matches,and finding the feasibility of method fusion.This paper takes the feasibility and application of the“Four-stage Index Assessment Method” in tennis technique and tactics,with the 2018 Paris Masters,the 2018 ATP Year Finals,the 2018 FN Finals,the2019 Australian Open Men's Singles 100 and the Women's Singles 100 matches as the subjects The feasibility of “Four-stage Index Evaluation Method” in tennis technique and tactics is analyzed in detail by the research methods of literature,video observation,expert interview,mathematical statistics and logic analysis,and the application of the “Four-stage Index Evaluation Method” in tennis technique and tactics is proved by example,and proves that “the Four-stage Index Evaluation Method” is proved under the premise of feasibility.The Four-stage Index Evaluation Method can count the playing ability of a tennis player's playing technique and tactics after the combination with the existing tennis technique and tactics evaluation standards,as well as the rules of tennis,so as to evaluate the technical and tactical characteristics of the athletes more scientifically,rationally and in detail.Through the study:1.On the basis of group theory,sports competition,project history development process and expert's approval,the “four-stage index evaluation method” as a method of technical and tactical statistics of table tennis can be integrated into the technical and tactical statistics of tennis.After the fusion of this method,it is possible to evaluate the technical and tactical characteristics of tennis players more scientifically,detailed and accurately.2.The method of diving the four stage thinking is also applicable to thestatistics of athlete?s tactics on clay courts and grass courts.The earth speed on the red clay field is slow,the ball bounces high,and there are many rounds of stalemate;the grass field ? s batting rhythm is faster,and the number of rounds is relatively small;but this has a small impact on the integration of the new method.3.Through the study of 100 men's singles matches and 100 women's singles matches,the technical and tactical “four-stage index assessment method” of tennis techniques and tactics,the individual singles,women's singles scoring rate and utilization rate assessment criteria,compliance with the evaluation criteria and the score rate indicators,usage indicators classification can be detailed statistics of the technical and tactical characteristics of athletes.Combined with the original tennis technical and tactical statistical methods and four paragraphs,the coaches to solve the problem of not clear technical weaknesses of athletes,athletes' shortcomings can be clearly reflected by the “four-stage index assessment method”.4.The “four-segment index evaluation method” is used to conduct empirical research on the technical and tactical characteristics of men's Djokovic and women's Naomi Osaka.Djokovic's four indicators are evenly distributed.There are many “excellent” hair-scraping sections and many“ medium ” standards for use;they have strong guaranteeing ability.Djokovic's obvious advantages are the receiving and grabbing stages and the stalemate stage;especially in the stalemate stage ?,the consciousness of transitioning the score to the stalemate stage is strong and the stalemate ability is strong.Djokovic gave full play to the characteristics of the high scoring rate in the stalemate stage,making up for the shortcomings of the remaining three stages.Osaka's straight hair rushing and receiving hair rushing scores were “passing” with too many scores and poor stability.Stalemate II is the most advantageous stage for Naomi Osaka;in Stalemate II,Naomi Osaka can score many points by improving her status.Slow to enter the game is a disadvantage;once the state is unstable,it will lose the serve and form a backward situation.