Along with all other things tennis related, I love tennis video games.
My favourites are the tennis game which was made for the original Nintendo gameboy in the early 1990s; any version of virtua tennis (especially the arcade machine); and super tennis for the old Nintendo SNES.
(I've only played Wii tennis once, and couldn't get on with it, but I'm sure that given the time and opportunity I could grow to love it.)
So I was really interested when I heard about this tennis videogame designed in 1958 on an oscilloscope at the Brookhaven National Laboratory. Very cool.