Diagnostic Index System Construction And Application Of Tactical For Tennis Men’s Singles Competition In Hard Ground

It is an important guarantee of improving the competitive level of athletes by constructing the diagnostic index system scientifically,diagnosing and evaluating players’ tactics,and monitoring the development level of athletes’ tactics effectively.It is still blank of the the research on tennis game tactics diagnosis index system.Due to the essentiality of tactics in tennis,With the methods of video observation,mathematical modeling etc,this study constructs a diagnostic index system of tactical in men’s tennis singles competitions on the hard ground,which provides references for Chinese men’s tennis players to improve their tactical level,and also for the development of the special theory of tennis training and enrich the methods of tennis tactics diagnosis.The research’s conclusions are as follows:1)Based on the combination of empirical analysis and expert experience,this paper constructs a tactical diagnostic index system and establishes the evaluation criteria,which includes 3 first-class indicators,6 second-class indicators,10 third-class indicators,5 fourth-class indicators and 19 five-class indicators.2)From time and space dimension,this paper demonstrates the effectiveness of the diagnostic index system: Each diagnostic index can reflect the overall tactical level of the athlete stably.3)There’ s a compensation effect between tennis tactical abilities and the indirect total effect is greater than the direct effect.The importance of the tactical factors is different.The important order of tactical factors is the attack and connection after serve,the attack and connection after reserve,reserve,the rally I,the rally II and serve.The paper build a tactical winning combination mode by using multiple liear regression and BP neural network,and a total score of over 21 points means win.4)By using the tactics diagnostic index system constructed,the athletes can be diagnosed immediately during and after the match relatively microscopically,and their competitive state can be grasped.It can provide the basis for athletes’ tactical strategy and training arrangements,which can also realize the tracking and evaluation of the advantages and disadvantages of the athletes’ use of various tactical links,and monitor the development trend of athletes’ tactical level in different periods in real time and to carry out scientific training.5)Based on the research methods of TOPSIS and entropy-weighted gray relational analysis,the paper carrys out a dynamic comprehensive evaluation of tactics of Federer,Nadal and Zhang Ze,and the evaluation results are basically consistent with the actual situation of the competition,which prove that the two evaluation methods can effectively evaluate the technical and tactical strength of athletes.