However, there is a difference of the big distance of the physical principle in the car to achieve an effect and for the racket it has another purpose, but in both cases, the diffuser serves to direct the airflow.Advantages found after tests were, improved speed of the player with a Varlion racket Avant diffuser compared to the same racket without a diffuser, both for fast shots as smashes (where it is most noticeable), as in medium shots. Also, tests showed that there has been achieved a greater regularity in the shots by making the trajectory more consistent by no influence of turbulence, that normally is provoked in the heart of a conventional racket, thereby attaining more shots with greater control.