Roger Federer fitness training as a junior.

Roger Federer practices on grass in Halle, Germany

Roger Federer practice groundstrokes on clay in Hamburg, Germany

Roger Federer; practice groundstrokes

Roger Federer; wide FH slow motion

Roger Federer & Andy Roddick; Serve side by side slow motion

Roger Federer; Serve slow motion

Roger Federer; Serve & Volley slow motion

Roger Federer: FH drills

Federer and Agassi playing on a scary tennis court