Use the Rulo, a topspin overhead aimed at the fence, primarily from the left side over your left shoulder, aiming near the second post, and tactically target opponent's feet when they approach the net.
This analysis of the Rulo shot is really helpful if you want to add a tactical topspin overhead to your game. Coach Sandy explains what the shot is and why it's so effective, especially from the left side. You'll get clear pointers on where to aim and how to start incorporating it. The coach also touches on how more advanced players can use it strategically against opponents.