Construction And Application Of A "three-stage" Evaluation System For Men's Singles Tennis Competition Techniques And Tactics

This paper uses the methods of literature,expert interview,video observation and mathematical statistics to make statistical analysis of 40 matches of the top seven male single players in the world tennis,divides each type of tennis match into three sections,takes the scoring rate and usage rate of technical and tactical as the evaluation index,establishes the standard of each stage of the game by using the percentile method,and forms the "three-stage" evaluation system of tennis match technical and tactical.This system is used to analyze the technical and tactical characteristics of Chinese and the world's outstanding men's tennis players in each stage,in order to provide theoretical basis and reference for the diagnosis of Chinese men's tennis players' technical and tactical skills.The findings are as follows:The "three-stage" evaluation system of tennis men's singles games is to divide a game into serve,receiving,and seven innings.Each type of bureau is divided into three stages:hair/watching stage,contention stage and holding stage.The scoring rate and utilization rate are taken as indicators to form a complete system.The standard of "three-stage" evaluation system of tennis men's singles player's hard ground match technique and tactics was established by using percentile method.The three-stage scoring rates under each type of bureau were evaluated by four grades: excellent,good,qualified and failing,and three grades with high and low utilization.If the score rate of serve is 100%,the score rate(100%,87.5%)is good,the score rate(87.5%,66.7%)is pass,the score rate <66.7% is pass.flunked;the usage rate ?75% was high ?75% corresponding standard,the score rate(75%,40%)corresponding standard was medium,and the score rate<40% corresponding standard was low.It is concluded that the system can reflect the application of technical and tactical abilities in each stage of the game,analyze the advantages and disadvantages of each type of game in detail,and analyze the application of technical and tactical techniques in each stage of the game from the angle of each set and one game.Through a large number of data statistics and empirical research,we have revealed the rules of gain and loss in men's singles :64% of the scores in men's singles games occur in the first four beats,which shows that to win the men's singles games,we need to take the initiative in the first four beats and have the ability to score the first four shots.If the first four beats did not produce a loss,the result of the game mainly depends on the score of 25% of the competition.The scoring advantage of the serve side is reduced,and the receiver side is dominant.