What happens when your athlete has movement difficulties? Sometimes you simply need a different cue and other times you need to give them some manual feedback. Then for others, they simply need to practice.
For some, however, neural tension may be at issue. I want to first say that anyone suffering from even just one symptom such as radiating pain, numbness or tingling should see a health care practitioner. And if you're unsure, I would play the safe card and refer them out anyway.
Here are more informational resources on neural tension and neuromobilization.
There are some simple exercises that can be performed to effectively release some neural tension: