Hi, I had a successful ligament replacement surgery 4 years back, I took initial physiotherapy as well for 6 months and then stopped. I run, jog, swim and I had no issues but recently I felt that my knee I getting weaker, not that I have any pain. Also, while playing Football sometimes I have felt severe pain when you tackle on sides and I fell all my physiotherapy excercise were focused on front and back movement which worked but these sides are just weak. Please advise. Regards Sandeep