I don’t like long complicated answers so here’s goes! I guess I got a little carried away! LOL
Your question is about friction massage and a tendon called the superior peroneal retinaculum (spr). I work on a lot of runners with many similar issues. You don’t say how long ago and how you injured your ankle. You also don’t mention if you have had an MD or specialist look at you and did they refer you to have x-rays or an MRI. If you have insurance the MRI would be very helpful. You also don’t mention if you have had Physical Therapy for your leg and foot. I’ve found in the past that MRI with or without a diagnosis combined with a good physical therapist and a knowledgeable sports LMT works pretty well. Regardless, applying different friction massages in different areas of the foot and leg is what works. I’ve found that you should also work the entire foot, calf muscles, and the front of the leg at many different angles. Unfourtually, most people can’t apply the pressure needed and take the pain that is required to break up the microscopic adhesions and scar tissue to increase blood and oxygen flow in those areas that already have limited blood and oxygen flow.