Do the stretch I suggested earlier, then do an air squat. If hamstring tightness is the problem or even a contributor, you should be able to tell the difference. Same with the ankles, and possibly the glutes and adductors...
It's a bit odd that they don't mention hamstring tightness. It is definitely a factor though. Remember that the hamstring is a player in two joints, not just the knees.
dec log, goals: states '10 - 5600; states '11 - 6400