All dulltards. They should make a tournament of 28 players, with the 4 most famous dulltards given a 1st round bye. Moonball obviously allowed.
You would have to explain to them
a) what the court looks like
b) what the ball looks like
c) half the rules. only half, because that is how many rules their beautiful Wafa takes notice of
Out of interest, who are the 4 most famous dulltards? GSMnadal has got to be one. The likes of Goatdal are too new and other dulltards seem to constantly get banned and then reinvent themselves, only to get banned again