Topspins

I can hit other strokes but forehand topspin. I wonder what is the difference between loop and topspin

one trainer says a counter hit is topspin with closed-angle and close to the table and a loop is an open angle away from the table. another says that a counter is a very weak topspin and everything else is a topspin. 

how to hit the ball more with topspin and what is a counter and a loop?

Hi Jon,

They are all similar strokes just extensions of each other.

Take a look at our tutorials on the Forehand Counterhit, the Forehand Topspin Against Block which is what is usually referred to as a topspin and then there is the Forehand Topspin Off Backspin which is often referred to as a loop.