I am constantly trying to improve my tennis technique.
Recently I made this discovery: you can actually hit a killer forehand standing on one foot. Guess which one it is?
See picture below for the correct answer
So the next time you train or practice with your mate, try to balance the weight on the right foot before hitting the forehand. In order to do that you will need to preprare the position correctly with an approaching step, then you can force the weight on the right foot by lifting the left foot from the ground slightly before you hit. See also Roger Federer position just before hitting a forehand. Picture below.