An Analysis Of The Characteristics Of Technique And Tactics In Different Periods About Sloan Stephens' Hard Count Match From 2013 To 2017

Sloan Stephens,(Sloane Stephens)is now 24 years old,2017 U.S.open women's singles champion,now WTA world women's singles ranked ninth,is the Williams sisters after the United States is the highest ranked female tennis player,by the United States tennis placed high hopes,is also one of the most potential new star.Stephens in enter the profession after the game,coach change more frequently,change in improving tactics using state,thus form the large fluctuations,caused a record number of instability.In 2013,I entered the early stage of the professional competition and beat the world's top players.From 2014 to 2016,only three tournaments have been won,and the first-round exit is often seen in grand slam events and high-level events.After coming back from injury in 2017,he won 22-2,and his competitive status increased significantly.Through video observation,mathematical statistics,literature,comparative analysis,the stephens form in different periods of 2013-2013 technique were analyzed,and find out the advantages and disadvantages of tactics and form a wave of reason,the following conclusions:1.According to the development of the record in time,the process of competitive state is divided into three periods: the outstanding period in 2013,the low period of 2014-2016 and the return period of 2017.2.In the overall application of the technique and tactics,stephens is a player with a linear style and has a steady technical ability of receiving and serving.The ability to serve,to hold each technical ability,and the ability to combine the tactics,vary with the fluctuation of the competitive state,which is the cause of the fluctuation of the competitive state.3.In the aspect of serving ability,serve velocity decreases gradually,gradually stable to serve,serve attack by the pursuit of speed and backhand attack as the leading way of a single type of attack,into rotation,Angle,depth of multivariate type attack.4.In terms of receiving,overall the ball in the defensive line for road.Hand position is backhand and no obvious disadvantages,receiving not affect stephens fluctuation reasons of form.5.In the American technology,the technology using comprehensive increase gradually,the defensive play into the attack and defense both sent,the improvement of the technology stability caused by fluctuations,is the important reasons for fluctuation of form.6.In terms of tactical combination,cutting technology change from passive to active,the direction,the focus on the bottom line forever attack the backhand,to control the opponent back,gradually transformed into a diversified technology,Angle,depth,speed,spin,effectively,increase the ground attack range more fluid.