Originally Posted by luvforty
the definition of 'penetration' is speed... you can't have a floaty slice that penetrates, even if it spins at 10000 rpm...because after the bounce all that 10000 rpm underspin becomes 50rpm topspin.
and to produce speed is simple, you need the hitting unit of arm/racket moving FORWARD at impact.
True. The slice needs to be "hit" not a chopped. The racquet comes from high to low, but in a forward movement, hitting the ball. Thats how you get a penetrating slice. If the slice is very low but short and not very fast it will be easier to return.