I think I just self diagnosed my left sore ankle condition as posterior tibial tendon dysfunction (PTTD), or posterior tibial tendonitis. Of course, I will get this professionally confirmed with my doctor but in the meantime, has anyone dealt with this condition, and if so what information, advise, treatment, rehab, ankle support/brace used, etc... can you pass along to me? Some background info: I am a very active person, 47 yrs old, USTA verified 4.5 was 5.0 but getting older, and I play several hours of competitive tennis weekly and until now never had an ankle issue. However, I had been flat footed on my left foot ever since I can remember without any problems, (normal arch on right foot). Also, I recently installed Super Feet "Green" Insoles in my tennis shoes to aid my left flat foot but it hasn't really helped. Any comments are appreciated.