Federer has such great footwork and everything seems effortless to him, so I was wondering what he does differently and why. I noticed that he runs, uses adjustment steps and then takes a large step again. I also noticed that Del Potro does this as well. I was always taught to use large steps and then adjust to the ball, as I am sure most other people have as well. What is the benefit of this? Also if you have any other observations on his footwork wich are unique, feel free to share them!!