I gave up on the public health care and went for a private hospital to find the best known orthopedist surgeon in Denmark. In just few minutes he found out that the muscle was ruptured from the upside, without looking at the Wikipedia reference-linkMRI at all.

I did not have a surgery to find this out. However, a knee surgery revealed that the acl was wrongly inserted.

In your case, you should really demand MRI.

If there is a tendon rupture, the muscle is loose at the other end.

If you can consult a respected orthopedist who works mostly with sports people, you should definitely do that even though it will cost you some money, that is if you can afford it.

Best of luck