In my opinion Roger Federer has one of the best forehands of all-time. Federer did mention in an interview (link is below) that what makes Del Potro’s forehand so lethal is that he stays committed to being aggressive with his shot until he finds his range. Del Potro hits a very flat, penetrating forehand. In this video I compare Roger’s and Juan Martin’s forehands side by side, 240 frames per second.