A Tracking And Judging Analysis Of The Application Of Kei Nishikori’s Technique Based On Big Data

Nowadays,big data analytics has penetrated into many sports competitions and training since it can achieve the training goal of athletes and coaches more quickly and accurately,standardize and improve athletes’ mechanic as well as assist coaches to select teaching materials and provide guidance to athletes in their competitions.And public resources data on official websites which used to analyze athletes’ technique are the most authoritative,precise and reliable.However,the academic studies of Kei Nishikori’s techniques are limited.In this paper,Kei Nishikori’s technique was studied by using big data analytics,in order to expand its influence and research depths,which brings insights to the evolution of Kei’s technique.Taking the competition data of tennis player Kei Nishikori from 2007 to 2016 as the implementation object and using the methods of literature review,mathematical statistics,comparative research and logical analysis,this paper studied his performance and analyzed his technique application in his tennis playing.Thus the analysis data of 12 indexes are collected in hard court,clay court and grass court,including service and service reception,which lays a solid foundation for analyzing Kei Nishikori’s technique application.The conclusions are as follows.Firstly,Kei Nishikori’s first serve in hard court was quite aggressive and high scores could be obtained in the serve.With the enrichment of experience,his winning in key points increased year by year,and his psychological quality and strain capacity were enhanced accordingly.The overall scoring rate in service reception remained stable without significant fluctuation.Secondly,Kei Nishikori could improve scoring rate in his serve because he got the edge in serve in clay court.The gained and lost points of his second serve were basically stable.He had better scoring rate in his serve on clay court than hard court.However,it was hard for him to get the key points so it is suggested that he should improve his stamina to reduce the reaction time of the key balls.The scoring rate in service reception went downward and his situation was much passive.Finally,Kei Nishikori could get a higher scoring rate in his serve in grass court and even the key points sometimes,while the overall scoring rate in service reception is comparatively lower.In view of the specific problems found in the study,the following suggestions are made.Firstly,enhance physical quality and stamina to maintain the mid rally strokes inservice reception on the basis of keeping serve offensive in hard court.Secondly,increase the training of service reception technique and develop the return ability in mid rally strokes in order to reduce the possibilities of creating an attack for opponent in clay court.Finally,grasp the key points better,improve the quality of service reception,and lessen passivity in service reception so as to raise the achievement ratio of service break.