Yep, as NextLevel already said, when you loop backspin, your racket is going with the spin.
Hence Pnatchtwey's famous quote that all one needs to do to loop backspin is have the "tangential" (he loves that word tangential) speed of his racket going at the same speed as the speed of the incoming spin and you will loop the ball.
If you loop and the opponent chops and you keep going you can add more and more spin to the ball. This is because both players are going with the spin and adding more spin to each successive shot.
Neither looping backspin or chopping topspin are easy. But what they are is a matter of technique. When you get comfortable looping heavy chop, it becomes more fluid. I am guessing the same is the case for chopping heavy loop although I totally suck at chopping. But, I think, as NextLevel intimated, the Long Pips, make it easier to chop heavy topspin because they don't grab the ball to the same way so you can let the ball actually spin on the surface of the rubber. Yes, if the LP player makes deeper contact the pips bend and the side of the pips can grab the ball. That will make the chop heavier. So there is an art to using LP.
What a good LP chopper does that makes things even harder for a looper is they can adjust their contact to make every ball have completely different spin so that the looper really has to read the spin well and see the balls that are heavy, medium, light or dead.
If you try to loop a dead ball as though it was heavy, the ball goes long. If you try to loop a heavy ball as though it was light, the ball won't even get to the net.
But you should see what happens to a chopper if you give him what Wally Green calls "Heavy No Spin"!
Wally has this shot that looks just like a slow heavy loop. But it is a no spin ball. It is pretty fun to see a good chopper misread the spin on that shot! [emoji2]
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