Check out these slow motion forehands from Juan Martin del Potro during a practice session in Cincinnati, Ohio. Youre not going .\r<br>\r<br>Footage of Juan Martin del Potro hitting his forehand and backhand in super slow motion at the 2013 Cincinnati Open.\r<br>\r<br>tennis practice, tennistraining, Novak djokovic Trainning, Highlights Trainning, Roger Federer Trainning, Rafael Nadal Trainning, Andy Murray Trainning, John .\r<br>\r<br>tennis practice, テニス練習, tennistraining Novak djokovic Trainning, Highlights Trainning, Roger Federer Trainning, Rafael Nadal Trainning, Andy Murray .
