Hey Darion, ok so this won’t be the rubber, most likely it is that it’s the angle of the bat when you are hitting your topspin shots. It’s probably that even though you are using a good full arm stroke and pushing forward that your wrist is contacting slightly around the side of the ball as well as you hit it. So have a look at your wrist and see if it is dropping downwards which will mean you hit around the side more causing some sidespin