The Stars are really important to become a legend so use them
wisely! If you want to have incredibly fast serves which you can
finish off with a fast or risk shot then choose to take on the
serve star challenges, if you want to be able to place your shot
anywhere on the court with power then do it with forehand and
backhand stars,volley stars are good but not so good when playing
the top players as if you come forward they just lob you, so do
use up so many stars on volley! Choose your masteries wisely. I
recommend precision, speed and power as the best. Good luck!!!