Spin can be reversed when using rubbers like anti-spin
or long pips
When playing against normal grippy rubber, if the opponent gives you topspin and you block, it goes back as the same spin, topspin. If you block the same shot with long pips or anti-spin, the spin can be reversed, becoming underspin. Many players are not used to playing against long pips and anti-spin, so spin reversal will be a major challenge.
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