| Tennis receiving and serving has been considered as a defensive technology for a long time.With the continuous development of tennis technology,more and more world elite women tennis players pay attention to the offensive nature of receiving and serving,and the technical and tactical level of receiving and serving is also improving.The world’s elite female tennis player Naomi Osaka’s ability to receive and score and break the serve is very prominent.Its performance of receiving and losing points has a strong reference value for China’s female tennis players’ relatively weak technical and tactical ability of receiving and serving.The purpose of this study is to make a statistical analysis of the gain and loss of service return points of Naomi Osaka in the third Australian Open from 2019 to 2021,and try to put forward a quantitative subsection evaluation standard for its service return scoring ability.This paper can enrich the theoretical significance of women’s tennis score and loss,technical and tactical research,and guide China’s women’s tennis players to scientifically train the technical and tactical ability of receiving and sending.This paper uses the research methods of literature,expert interview and video analysis,and takes 16 matches of Naomi Osaka in the third Australian Open in 2019,2020 and 2021 as the investigation object to study the gain and loss points of Naomi Osaka,the world’s excellent female tennis player.The following conclusions are drawn:（1）From 2019 to 2021,the scoring rate P value of Osaka Zhimei’s service return in the third Australian Open is 0.697 > 0.05,there is no significant difference,and its service return performance is stable;The break rate of the receiving and Serving Bureau reached 37.80%,and the average data of the opponent in the game was17.95%;The scoring rate of return of service reached 43.08%,and the average data of opponents in the game was 34.96%.（2）In the third Australian Open from 2019 to 2021,the direct winning and losing rate of Osaka Zhimei’s receiving service is 37.10%,and the direct winning and losing rate of receiving one serve is 30.74%,which is significantly lower than 49.64% of receiving two serve.There is no significant difference in the p value of the score rate of each area,and the performance of the direct score is stable.In the case of direct gain and loss of points in the receiving service,the main scoring means for the receiving service is to return to the back court of the middle with a small oblique line on the side;After receiving the second serve,attack the opponent’s left back court with a variety of hitting lines as the main scoring means;The loss points of the first and second rounds are greater on the side than on the middle.（3）From 2019 to 2021,in the third Australian Open,Osaka Zhimei’s winning and losing points rate in the second round of receiving service is 40.44%,the winning and losing points rate in the second round of receiving service is 32.26%,and the winning and losing points rate in the second round of receiving service is 57.14%.The p value of the score rate of the left midfield in the second round is 0.33,which has a significant difference.The performance of service reception in this area is relatively unstable.Osaka Zhimei’s second round gain and loss points,the scoring line of the second round is similar to that of the first round,but the landing point frequency is higher than that of the first round.Osaka Zhimei received a shot,and the area with the most scoring points in the second round is L3（left backcourt）.The overall scoring points are left > right > middle.（4）From 2019 to 2021,the winning rate of the third Australian Open Osaka Zhimei service receiving stalemate stage is 48.21%,the scoring rate of the first service receiving stalemate stage is 47.22%,and the scoring rate of the second service receiving stalemate stage is 50.00%.In the stage of receiving stalemate,the p value of the left backcourt is 0.076,and the p value of the middle backcourt is 0.065,which is obviously different.The performance in the stage of receiving stalemate is relatively unstable.The overall score loss line of scoring rate is straight line ≈ small slash >large slash.（5）The third round of the 2021-2021 direct match in Osaka,Australia.The direct scoring rate of the next round is good,and the scoring rate of the second round of the next round is good;The direct scoring rate of the second round is good,and the scoring rate of the second round is excellent;The comprehensive score rate in the stalemate stage is qualified.The comprehensive performance of the three Australian Open tennis matches in Osaka is 2021,2019 and 2020 from high to low.The following recommendations are made:（1）The research object of this paper is the score characteristics of the world’s excellent female tennis player Naomi Osaka.Due to the individual differences of tennis players’ competition style and competitive level,it can not fully represent the overall level of the world’s excellent female tennis players.The research conclusion can only provide reference value.（2）The observation method used in this study is mainly the traditional video analysis method.Even if the auxiliary line is added,the technical and tactical indicators of each point cannot be 100% confirmed by the naked eye.It is expected that researchers can develop more research methods of tennis techniques and tactics by using the power of science and technology. |
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