Evaluation And Diagnosis Of Athletic Performance Of American Open Women's Singles Players

With the development of society,the improvement of people's living standards,tennis is more and more popular.Li Na has won nine WTA singles Championships in her 15-year career,including two Grand Slam singles champions.But since Li Na retired,Chinese women tennis players have never won the women's Grand Slam singles championship.Therefore,it is of great significance to improve the competitive ability and achieve excellent results of Chinese women singles tennis players by establishing the structure model and evaluation criteria of female singles tennis players' competitive performance,evaluating and diagnosing the performance of female singles tennis players,and exploring various factors affecting their competitive performance,as well as advantages and disadvantages.In this study,the female singles tennis players who participated in the 2017 US Open tennis season were taken as the research objects.By using the methods of literature,expert interviews,questionnaire survey,mathematical statistics and logical analysis,the performance of female singles tennis players in the US Open was evaluated and diagnosed.The following conclusions were drawn:(1)Established the evaluation index system of women singles tennis players' competitive performance,and finally selected nine on-the-spot technical statistical indicators of regression equation to be the evaluation index of women singles tennis players' competitive performance.(2)The structure model of female singles tennis players' competitive performance is constructed.The scoring evaluation criteria and grade evaluation criteria are established.The structure model includes service attack performance factor,active attack factor and air antagonism factor.(3)European women singles tennis players have a higher level of performance,among which Ka.Pliskova has the highest level of performance.European women singles tennis players have comprehensive skills and no disadvantage indicators.Their competitive performance is mainly reflected in the performance factor of serving offensive,and their air confrontation ability is relatively weak.(4)American women's singles players have high level of performance,comprehensive skills,no short board,and have their own special skills-service score,non-forced mistakes are their relatively weak skills.Their competitive performance advantages are mainly reflected in the performance factor of attack and active attackfactor.(5)There is a big gap in the level of performance of five players in China.Wang and Zhang Shuai have higher level of performance than the other three.Wang and Zhang Shuai have their own strengths and comprehensive skills.Wang Shuai's advantage index is total score.Zhang Shuai's advantage index is relay score rate.Duan Yingying's competitive performance level is relatively low.Duan Yingying's disadvantage index is success rate.Peng Shuai's total score is low.Zheng Sai-sai has no self-help.In terms of service performance factor,Wang Qian and Zhang Shuai scored higher than average,in terms of active attack factor,Zheng Sai-sai scored higher than average,while others scored lower than average.(6)Oceania women's singles players D.gavrilova and A.Barty perform well.The other two players are of low level.They have both their own superior skills and short boards.Their scores of active offensive factors and air confrontation factors are not high.(7)African women's singles player's athletic performance is in the middle level,the player's second-round scoring rate is high,and the air confrontation ability is insufficient.