Hey Hamza, sorry I missed this question! Yes I know what you mean I think you need to practice linking both together so doing lots of open ups but then follow up with a normal backhand topspin. This will help you get the transition between the two. Make sure after the open up you get the bat up and over the next shot to keep the ball down and avoid it going long.
I also think if you practice plenty of this and getting the shots going well together you will find the muscle memory is there for both shots. Let us know how you get on!
Dan 🙂Â