Comparative Analysis Of The Application Of The Top Four Defensive Techniques In The Final Phase Of The Two World Cup Football Matches

This paper analyzes the defensive techniques applied by the top four teams in the final two World Cup finals to find out the characteristics of differences and changes,so as to predict the development trend of future world football defense,so that we can learn the world's high-level teams.The defensive advantage provides reference and valuable experience for the development of Chinese football.Based on the domestic “conventional technical statistics” method,this paper combines the opinions of football experts and scholars to formulate standards that are consistent with the research statistics of this paper.Research methods such as expert interview,video observation,and mathematical statistics are used.Based on the defensive technical application of the 2014 Brazil World Cup semi-finals and the 20 th World Cup in the 2018 World Cup,the results show that:(1)The total number of times of the top four ball grabbing techniques is higher than that of the last four,and the chi-square test of the ball data of the front,middle and backcourts,P=0.092(>0.05),the difference is not significant.The chi-square test of the ball-carrying data of players in different positions,P=0.946(>0.05),the difference is not significant.(2)The total number of times of this four-strong ball-breaking technique was higher than that of the previous four,and the chi-square test of the ball data of the front,middle and back fields,P=0.049(<0.05),had significant differences.The chi-square test of the ball-breaking data of the striker,the avant-garde and the defender,P=0.774(>0.05),the difference is not significant.(3)The use of the top-of-the-line technology in the current top four has been greatly improved compared with the previous session,as well as in various venues.The chi-square test of the top-ball data in the front,middle and back fields,P=0.611(>0.05),the difference is not significant.The chi-square test of the top,avant-garde and defender's top-of-the-ball data,P=0.952(>0.05),the difference is not significant.(4)The last four strong teams used the tackle technology in all regions of the game to be higher than the current semi-finals.The chi-square test of the tackle data in the front,middle and backcourts,P=0.907(>0.05),no obviously different.The chi-square test of the forward,avant-garde,and guard tackle data,P=0.929(>0.05),the difference is not significant.(5)The total number of defensive techniques used in the current semi-finals was significantly higher than that of the previous four,and the chi-square test of the overall defensive technical data,P=0.000(<0.01),had a very significant difference.The group stage used a chi-square test of various defensive techniques,P = 0.000(<0.01),with very significant differences.The knockout uses a chi-square test of various defensive techniques,P= 0.000(<0.01),with very significant differences.