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Watch this rally with Chris Fuller and Peter Nicol, and see how they use a short swing to threaten hitting to the front. Their opponent must then come forward to cover the short shot. Now watch how they both play the ball deep to the back of the court working their opponent to the back corner from high on the T.
This of course may win the rally outright with a perfect dying length, but has the added value for later on in the match, when the work you are now putting into their legs eventually tires them out.