Tennis bot, coming soon

Two wheels, three inch width, balloon tires, low pressure made of tennis shoe rubber.

The wheels support a column, atop of which is an articulated swinging arm and a counter pose arm.

Power it with a cord back across the baseline, it will play all day, and the bot can manage its power cord, reeling it in  and out.

Software can make this beast do the Federer.  Easy stuff, assign it to the undergraduates.