Originally Posted by GoaLaSSo
Also see in the 5th djoko picture how he gets in the legs fully bent and and reaches an almost sitting position? Raonic reaches this same position just before he launches up toward the ball.
The easiest way to do this whole process is to focus on reaching that position after you start transferring your weight forward. You kind of push down and out with your left hip and feel a bit of a stretch in the butt area.
I second this (for what is worth) and as a result your heels lift up(you are not flat footed), especially if you also show your belly to the sky