Balance and Position   

Most coaches emphasize body positioning and balance to execute a stroke.

Unfortunately, in my opinion, it is this emphasis that traps the attention of the individual and detracts from the stroke.

Furthermore, tennis is a game of emergencies, so you are forced to hit on the move, on the run, your opponent sometimes jams you, etc.

An accomplished player would focus on his hand executing the stroke, and let his instinct help to accommodate the rest.

Oscar Wegner,