Research On The Application Of Djokovic's Skills And Tactics In The 2021 Grand Slam Competition Based On Entropy Weight-grey Correlation Metho

The national sports policy points out the direction for the development of competitive tennis in China,and the continuous innovation of tennis techniques and tactics promotes the development of competitive tennis.Through collecting and sorting out a large number of relevant documents,summarizing previous research results,this article conducts a study on the technical and tactical use of Djokovic in three different venues in the 2021 season,namely the Australian Open,French Open,and Wimbledon.Using the entropy weight gray correlation method,it reveals the technical and tactical factors that have an important impact on winning the championship from a mathematical level,expounds Djokovic’s technical and tactical use strategies,and puts forward targeted suggestions,Provide some reference for the theoretical innovation of tennis training.This paper uses the methods of literature,video observation,expert interview,entropy weight-gray correlation and mathematical statistics to make statistics on the data of 20 689 singles matches of Djokovic in the three grand slams of Australian Open,French Open and Wimbledon in 2021 season,and studies the application of technology and tactics,and obtains the main influencing factors for Djokovic to win the three grand slams.(1)Service stage: Djokovic’s service success rate is higher and the score rate is higher than that of his opponent on three different types of courts.The technique of the third racket is mainly based on the technique of forehand and backhand hitting at the baseline,supplemented by the technique of forehand side hitting.The third racket hit the ball deep and the area of the hit point is clear.The service and the third racket strike tactics are well coordinated,and the third racket strike technique fully shows the tactical advantages of service.(2)Receiving and serving stage: Djokovic’s receiving and serving success rate is high in three different types of courts,and the application of receiving and serving technology is relatively simple.The second racket technique of receiving and serving is mainly the forehand and backhand pumping technique.The application of other techniques such as chopping and chopping has been improved,and the change of hitting technique and landing point has been increased.The combination tactics of receiving and serving use the same side return,the opposite side return,and the middle transition tactics to create the difficulty for the opponent to return the ball and improve the individual’s competitiveness in the receiving and serving game.(3)Phase of stalemate: Djokovic uses more forehand and backhand hitting techniques on three different types of courts,and has strong baseline stalemate ability and active attack awareness.During the whole match,the stalemate stage is in the bottom line and the opponent is in a low frequency.The hitting tactics in the stalemate stage are to repeat(line)landing points,change(line)landing points,and change the rhythm to attack and defend with the opponent in multiple shots.