I spoke with over 50 senior players of various ability and asked them what their secret was. Contrary to popular belief, tennis is not a game of power but rather a game of consistency. The truth of the matter is that tennis is a game of errors and the person who makes the fewest errors wins. The key is for every player to hit at a pace that allows them to keep the ball in play. They just want to hit it hard.
Tennis is and always has been a game of consistency.
Many tennis magazines and teaching pros try to teach their students to play like the pros. When players hear and read this advice they go out on the court and try to rip the cover off the ball. They hit the occasional world-class shot and are pleased with themselves. However, they have forgotten the six errors that have come in between those world-class shots. I believe that the worst thing a junior can do is watch and then try to play by the pros.