The flexibility and the motion range of the hip joint is important not only for soccer ball juggling but also for soccer skills in general. Now I keep my left knee on the inside edge of the circle which is made by a jump rope and try to straddle the soccer ball with my right foot as far away from the circle as possible.
But the jump rope placed on the ground is not just for stretching but also for improving my juggling skills.
I sometimes use this jump rope when I practice soccer ball juggling. Previously, I chased the soccer ball and my position became very unstable. So I makes it a rule not to get out of a circle which I made with the jump rope placed on the ground. Thanks to this training, I could strengthen my core muscles and keep my body balance stable while playing in a soccer games as a defensive midfielder.