I have been helping my nephews get into tennis. The night before a league match I'm out hitting dead balls in cold weather. The next night in league I'm blasting all the balls long and its over before I can get a handle on the power issue. I think hitting the dead balls hurt my game. I'm thinking whats the point of hitting dead balls. Too costly to buy new all the time. The 3 clubs in my area use ball machines and the balls there are not lively either. I don't think the clubs get free balls so they must use them till they don't bounce. Wondering what most people do to practice. Do you just buy new balls every day and throw out the old?