gark,
the usual contact angle is more of a closed racket.however,as the ball is sinking below table, your racket will automatically go to a more open position since you will aim the tip of it at the top of the net.for underspin balls,i adapt to a different racket position to loop it.however, for weak underspin,you can just wait for the ball to sink below table to dissipate the spin and then loop it back. |