Needs to creat space correctly!
He is going to the left and back to hit forehands in order to creat space. You should be working on leaning in to the ball and having him hit much further away from the ball. What he is doing now is compensating for his crowding of the ball.
Jeff Drock MS, CSCS www.superfittennis.com
Certified Tennnis Specific Strength and Conditioning Specialist