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When the ball bounces near the nick, either on the wall or just on the floor, what ever happens to the ball happens quickly. So you need to expect the unexpected! In order to do that you must have A SHORTER SWING so when whatever happens happens you are ready to hit it.
As well as getting your racket prepared with a SHORT SWING you need to get your FEET IN POSITION EARLY and BEND YOUR KNEES down low so that whatever happens you are ready for!