You can only plan ahead of time if you can place your serves precisely, and know you can, while hitting it hard enough they don't just T off on it. Even then, a returner can hit a lucky mishit, throwing your plan into scramble mode.
But yes, duece court, serve up the T with heavy lefty slice, move in and plan to volley behind the player, who's scrambling to stop and recover back to near center.
If he lobs, you need plan B overhead.
If he chips low, you need plan C low volley to his weaker passing side.
If he returns a high floater, back to plan A and put it away near any sideline.