Hi, Im an ex tennis player if that matters. Last fall I had a small comeback after over a year of absence on the tour. Ive had 2 knee surgeries (left) to try and get rid of jumpers knee, chronic scar tissue. Successfully its been well since 2013. I have never felt the same strength on my left side than my right( playing right handed). I had a good comeback, though I played 7 matches on 6 days and on the last day something happened. Sharp pain when fully loading on slightly bent knee ( on my toes) trying to push off. We have tried to find the problem with multiple practitioners but so far no real progress.